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Control apparatus, system and method for multi-pole flexible direct current power transmission system

A flexible DC and power transmission system technology, applied in the direction of power transmission AC network, single-network parallel feeding arrangement, etc., can solve the problem that it is difficult to meet the requirements of system realization, there is no configuration scheme for the control device of the multi-pole flexible DC transmission system, Unable to meet the multi-pole system control requirements and other problems, to achieve the effect of independent functions, guaranteed reliability, and clear structure

Active Publication Date: 2017-01-11
NR ELECTRIC CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a multi-pole system, if each pole is independently controlled, it will be difficult to meet the requirements of the overall control goal of the system. Therefore, the control device of the unipolar flexible DC transmission system cannot meet the control requirements of the multi-pole system. Currently, the multi-pole flexible There is no feasible configuration scheme for the control device of the direct current transmission system

Method used

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  • Control apparatus, system and method for multi-pole flexible direct current power transmission system
  • Control apparatus, system and method for multi-pole flexible direct current power transmission system
  • Control apparatus, system and method for multi-pole flexible direct current power transmission system

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Embodiment 1

[0047] The control device of this multi-pole flexible DC transmission system can realize multi-pole coordinated control and meet the requirements of the overall control of the multi-pole system; in addition, due to the huge transmission capacity of the multi-pole system, the reliability requirements for the control system are also higher, so it is necessary to A special configuration design is carried out for the multi-pole system, so that the control system can meet the requirements of the engineering operation of the multi-pole flexible direct current transmission system.

[0048] see Figure 4 and Figure 5 , the control device of the multi-pole flexible DC power transmission system, including a multi-pole control layer, a pole control layer and a converter valve control layer connected in sequence; the multi-pole control layer is used to coordinate and control the active power and Reactive power, in order to achieve the overall control target of active and reactive power ...

Embodiment 2

[0102] The control system of the multi-pole flexible direct current transmission system includes a local station and an opposite station; the local station and the opposite station are connected by optical fibers or cables; the local station and the opposite station are the multi-pole flexible direct current transmission in embodiment 1 The control device of the system is no longer described in detail.

[0103] As a preferred solution, the reactive power control modes of the poles in the station are the same; the active power control modes of the poles in the station are the same; the reactive power control modes of the poles in the pair are the same; The active power control mode of each pole in the station is the same; the reactive power control mode of the station is the same or different from the reactive power control mode of the opposite station; the active power control mode of each pole in the station is the same as that of the opposite station The active power control...

Embodiment 3

[0105] The control method of the multi-pole flexible direct current transmission system is implemented by the control device of the multi-pole flexible direct current transmission system in Implementation 1. The realization process of the control device of the multi-pole flexible direct current transmission system is the same as that of embodiment 1, and will not be described in detail.

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Abstract

The invention provides a control apparatus for a multi-pole flexible direct current power transmission system. The control apparatus comprises a multi-pole control layer, a pole control layer and a converter valve control layer which are connected in sequence, wherein the multi-pole control layer is used for coordinately controlling active power and reactive power of multiple flexible direct current poles to realize a general control object for active power and reactive power of a full station; the pole control layer is used for completing independent control on active and reactive power of single flexible direct current poles; and the converter valve control layer is used for completing control on a converter. The invention also discloses a control system and a control method for the multi-pole flexible direct current power transmission system. All in all, coordinative control for the multiple flexible direct current poles can be realized, and overall control requirement on the operation of actual multi-pole flexible direct current power transmission engineering can be satisfied.

Description

technical field [0001] The invention relates to a control device in the field of power electronics, in particular to a control device, system and method for a multi-pole flexible direct current transmission system. Background technique [0002] The flexible direct current transmission technology adopts the voltage source converter, which can independently adjust the active power and reactive power, and the control is flexible and convenient; the receiving end system can be a passive network, and no external commutation voltage is required; no reactive power is required from the AC side And it can play the role of reactive power compensation, dynamically compensate the reactive power of the AC bus, and stabilize the AC voltage; no communication is required between the converter stations, and it is easy to form a multi-terminal DC transmission system, so it is one of the development directions of power system transmission. [0003] The flexible DC transmission system based on ...

Claims

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Application Information

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IPC IPC(8): H02J3/36H02J3/46
CPCY02E60/60
Inventor 鲁江田杰董云龙卢宇李钢丁久东王柯
Owner NR ELECTRIC CO LTD
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