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STATCOM (static synchronous compensator) control method for voltage adjusting of wind farm and network nodes

A network node and node voltage technology, applied in AC network voltage adjustment, flexible AC transmission system, reactive power adjustment/elimination/compensation, etc., can solve problems such as voltage fluctuations and quality of the entire network that are not considered, and improve work efficiency effect

Inactive Publication Date: 2015-05-20
SOUTHEAST UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

The general STATCOM voltage control strategy tracks the voltage at the outlet side of the wind farm and quickly outputs or absorbs reactive power to stabilize voltage fluctuations. Under the radial structure of the distribution network, not only the voltage quality at the outlet side of the wind farm must be considered, but also the voltage fluctuations at other nodes of the line must be taken into account to increase the voltage level of the entire network to achieve the optimal STATCOM reactive power compensation effect

Method used

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  • STATCOM (static synchronous compensator) control method for voltage adjusting of wind farm and network nodes
  • STATCOM (static synchronous compensator) control method for voltage adjusting of wind farm and network nodes
  • STATCOM (static synchronous compensator) control method for voltage adjusting of wind farm and network nodes

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Embodiment

[0088] Embodiment: The following takes the IEEE33 node system of the distribution network as an embodiment to illustrate the present invention in detail.

[0089] The distribution network has 32 branches and 33 nodes in open loop operation, and the load of the whole network is 3.137+j2.388MVA. A 500kW wind farm is connected to the No. 1, No. 16 and No. 32 nodes, and a STATCOM with a capacity of 2MVA is installed on the exit side of the No. 16 and No. 32 wind farms. In order to verify the effectiveness and superiority of the present invention, consider the situation where the wind farm load fluctuates greatly, that is, the wind speed change range of the three wind farms is 5m / s-16m / s, and the change time is 200s. For a distribution network with two STATCOMs, this embodiment takes the following three steps into account to balance the wind farm and network node voltage fluctuations:

[0090] 1. STATCOM fuzzy clustering partition, the specific process is as follows figure 2 Shown:

[...

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Abstract

The invention discloses a STATCOM (static synchronous compensator) control method for voltage adjusting of a wind farm and network nodes. The method specifically comprises the following steps of (1) when a power grid is provided with a plurality of STATCOMs, separating the adjusting range of each STATCOM; (2) performing passive adjusting on local network nodes in a single STATCOM administrative area after area separating, so as to furthest guarantee that node voltage in the area does not exceed the limit; (3) finding the optimum voltage setting value of the STATCOMs, so as to enable the average fluctuating rate of the voltage of each network node to be minimum. Compared with the traditional voltage adjusting strategy for access points of the wind farm, the method has the advantages that the voltage fluctuating of all network nodes can be reduced, the voltage level of the network nodes is improved, and the purpose of improving the network running quality is realized; the characteristic of quick response of the STATCOMs is effectively utilized, the robustness and security of the power grid are improved, and the purpose of adjusting power grid voltage fluctuating and wind farm exit side fluctuating is realized.

Description

Technical field [0001] The invention relates to a wind farm reactive voltage regulation technology, in particular to a STATCON control method that takes into account both wind farm and network node voltage regulation. Background technique [0002] At present, the development of wind power technology is becoming more and more rapid. With the popularity of wind power and the continuous increase of capacity, the problem of grid voltage fluctuations caused by wind power is becoming more and more serious. At present, in order to effectively suppress voltage fluctuations caused by wind speed fluctuations, STATCOM is usually installed on the busbar at the outlet side of the wind farm. The general STATCOM voltage control strategy tracks the voltage on the outlet side of the wind farm, and quickly outputs or absorbs reactive power to smooth out voltage fluctuations. However, this strategy only considers the voltage fluctuations on the outlet side of the wind farm, and does not take into a...

Claims

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Application Information

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IPC IPC(8): H02J3/16
CPCH02J3/16H02J3/18Y02E40/10Y02E40/30
Inventor 蒋平冯士睿
Owner SOUTHEAST UNIV
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