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Selection method of dynamic reactive power compensation configuration point

A technology for configuring points and compensating devices, applied in reactive power compensation, AC network voltage adjustment and other directions, can solve problems such as grid voltage instability, and achieve the effect of fast positioning and simple and fast calculation

Active Publication Date: 2013-05-08
GRID POWER PLANNING & RES CENT OF GUANGDONG GRID POWER CO LTD +1
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Problems solved by technology

[0021] Aiming at the deficiencies of the prior art, the present invention proposes a selection method of dynamic reactive power compensation configuration points based on DC multi-infeed short-circuit ratio, which solves the problem of grid voltage instability

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  • Selection method of dynamic reactive power compensation configuration point
  • Selection method of dynamic reactive power compensation configuration point
  • Selection method of dynamic reactive power compensation configuration point

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Embodiment Construction

[0060] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0061] This embodiment provides a method for selecting a dynamic reactive power compensation configuration point based on DC multi-infeed short-circuit ratio, and its flow chart is as follows Figure 4 shown. Taking a provincial power grid system as a simulation example, it illustrates the calculation of the multi-infeed short-circuit ratio under different DC operating conditions in the AC-DC hybrid receiving power system, finds out the weak point of the system voltage stability, and finally determines the compensation of the dynamic reactive power compensation device. The implementation method of the configuration point:

[0062] (1) Establish the BPA simulation calculation data of the province's power grid;

[0063] The topological diagram of the power grid structure in a province is as follows: Figure 5 As shown, ...

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Abstract

The invention provides a method that the system strength and the degree of impact on a system due to a fault are measured through the direct current multi-infeed short circuit ratio after the direct current receiving end grid is failed and a dynamic reactive power compensation configuration point can be ensured, namely, a selection method of the dynamic reactive power compensation configuration point. The selection method of the dynamic reactive power compensation configuration point comprises the following steps: building a mold; ensuring a contact line of a direct current receiving system, a direct current receiving inverter station and an alternating current system and enumerating and predicating system status collection after fault; calculating the direct current multi-infeed short circuit ratio; predicating the weak point of voltage stability; conducting simulation verification. When the result of the simulation verification is the weak point of the voltage stability, a dynamic reactive power compensation device is configured. By means of consideration of the state of the system after the fault and the influence of the fault on the system, the selection method of the dynamic reactive power compensation configuration point compensates the influence of the multi-infeed short circuit which is used as an index obtained through a static calculation on the fault transient state procedure and on the system and overcomes the defect that consideration of the status of the system after the fault is not enough, and the calculation is simple and convenient.

Description

technical field [0001] The invention belongs to the field of analysis and calculation of power systems, and in particular relates to a method for selecting configuration points of dynamic reactive power compensation based on direct current multi-infeed short-circuit ratio. Background technique [0002] The interconnection of HVDC power transmission and AC power grid will form the interaction and influence between AC and DC systems. If the strength of the AC grid is weak, there will be a series of problems such as voltage instability, transient instability, dynamic overvoltage, and harmonic instability. The magnitude of the interaction between the AC system and the DC system, as well as the severity of the impact on the grid, largely depends on the relative size of the AC system and the connected DC system capacity. The strength of the AC grid can reflect the sensitivity of the components in the system to various disturbances. The strong AC system will not have significant ...

Claims

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Application Information

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IPC IPC(8): H02J3/16
CPCY02E40/34Y02E40/30
Inventor 陈湘朱浩骏唐晓骏丁伯剑左郑敏史正军
Owner GRID POWER PLANNING & RES CENT OF GUANGDONG GRID POWER CO LTD
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