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Transformer area three-phase imbalance treatment method based on demand response

A demand-response, three-phase technology, applied in the direction of reducing the asymmetry of the polyphase network, eliminating/reducing the asymmetry of the polyphase network, and data processing applications, etc. The effect of controlling cost, reducing load peak-valley difference, and controlling electricity cost

Active Publication Date: 2019-09-17
GUANGDONG POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Transformer area three-phase imbalance treatment method based on demand response
  • Transformer area three-phase imbalance treatment method based on demand response
  • Transformer area three-phase imbalance treatment 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 transformer area three-phase imbalance treatment method based on demand response. According to the method, by considering the price type demand response and the power consumer power demand adjustment uncertainty, a triangular fuzzy variable is introduced to represent a user power demand after implementation of a demand response so that a price type demand response fuzzy model is established; then a fuzzy opportunity constraint planning model for transformer area load adjustment is established on the basis of a credibility theory by taking an expected value of user power consumption as a basis and considering power user power consumption and power consumption expenditure satisfaction; and the fuzzy opportunity constraint is processed by using a clear equivalence class method, and the day-ahead electricity price of A, B and C three-phase power users is adjusted by taking the minimum power consumption deviation of the three-phase power users of the transformer area as the target, so that the purposes of reducing the peak-valley difference of the load of the transformer area and controlling the power consumption cost of the users are achieved while the three-phase imbalance degree of the transformer area is reduced.

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 Applications(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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