Multi-string SVC (Static Var Compensator) coordination control method

A coordinated control and multi-branch technology, applied in the field of control, can solve problems such as increasing the cost of compensation equipment and reducing the reliability of compensation equipment, and achieve the goals of reducing harmonic loss, improving stability, strong coordination, controllability and practicability Effect

Active Publication Date: 2012-07-04
保定市尤耐特电气有限公司
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Problems solved by technology

[0004] At present, the common way to solve the above problems is to use a single large-capacity compensation equipment for compensation, but this will not only increase the cost of the compensation equipment, but also reduce the reliability of the compensation equipment operation, so it is not an optimal choice

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  • Multi-string SVC (Static Var Compensator) coordination control method

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Embodiment Construction

[0022] The main control unit of the present invention collects the system voltage and current signals, compares them with the control target to obtain the reactive power required by the system, generates a compensation scheme according to the compensator capacity of the SVC branch, and sends instructions to the slaves of each branch In the control unit, the main control unit and the slave control units of each branch jointly execute the coordinated compensation command.

[0023] Compensation can be done in three ways:

[0024] 1. Single branch compensation: When the capacity of the compensator required by the system is less than or equal to the capacity of one of the branch compensators, the main control unit will directly issue compensation tasks to this branch for compensation.

[0025] 2. Coordinated compensation in the same proportion: each branch is coordinated and compensated according to the ratio of the reactive power capacity required by the system to the total reacti...

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Abstract

The invention relates to a multi-string SVC (Static Var Compensator) coordination control method, which comprises the following steps of: judging by an equal network loss ratio standard, selecting one of single subcircuit compensation, equidistant coordination compensation or random compensation as a compensation control scheme, and defining a var control numerical value; selecting one SVC control subcircuit as a main control unit from SVC control subcircuits in a power supply system, collecting system voltage and current signals through the main control unit; comparing the system voltage and current signals with a var control target so as to obtain a var power numerical value needed by the system; generating a compensation scheme according to compensator volume of each SVC subcircuit; and issuing a control command to a controlled unit of each subcircuit through the main control unit, and jointly executing the compensation coordination control command through the main control unit and the controlled unit of each subcircuit. According to the method, multiple var harmonic oscillation is avoided, the stability of the system is improved, the harmonic loss is reduced, and the multi-string SVC coordination control method is particularly applied to electric power supply systems constructed by stages.

Description

technical field [0001] The invention relates to a method for coordinated control of multiple SVC reactive power compensation devices running in parallel on the same busbar, and belongs to the field of control technology. Background technique [0002] In recent years, with the continuous increase of high-power nonlinear loads, the harmonic pollution brought by reactive power impacts to the power grid has become increasingly serious, and the resulting grid voltage and current distortions, three-phase imbalances and low power factors have become more and more serious. more and more people's attention. SVC static var compensation device has been widely used in the power grid because of its functions of quickly adjusting system reactive power and maintaining node voltage stability. [0003] For power engineering projects constructed in phases, it often happens that multi-branch SVC devices run side by side on the same busbar. The SVC devices of different regulation models run s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/18H02J3/01
CPCY02E40/12Y02E40/10Y02E40/40
Inventor 陈占群梁海涛王聪利崔静明安丽丽
Owner 保定市尤耐特电气有限公司
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