Reactive compensation coordination control method during DC emergency power support process

A technology of power support and coordinated control, applied in reactive power compensation, reactive power adjustment/elimination/compensation, AC network circuits, etc. And other issues
CN107069766AActive Publication Date: 2017-08-18NARI TECH CO LTD +3
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
NARI TECH CO LTD
Publication Date
2017-08-18

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Abstract

The present invention discloses a reactive compensation coordination control method during the DC emergency power support process and belongs to the technical field of power systems and automation. According to the technical scheme of the invention, according to a current running state and a to-be-lifted DC power, a reactive power, required to be consumed additionally for the DC system after the active power thereof is boosted, is estimated. Before the DC boosting process, filters or parallel capacitors of a corresponding number are put to use in the emergency manner. After the DC boosting process, reactive-load compensation equipment is put to use additionally according to the actual control manner of a convertor station. Meanwhile, the AC bus voltage of the convertor station is monitored. As a result, the condition that the AC voltage of the convertor station is out of limit due to the usage of the reactive-load compensation equipment can be avoided. The method can effectively improve the amount of the actual emergency power support in the DC large modulation mode. Meanwhile, the power imbalance problem of the power grid of a receiving end can be effectively relieved, and the safety and the stability of the power grid are improved.
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Description

technical field

[0001] The invention belongs to the technical field of electric power system and automation thereof. More precisely, the invention relates to a reactive power compensation coordination control method in the DC emergency power support process. Background technique

[0002] At present, many regions in my country have formed a grid structure with multiple DC feeds. Due to the large capacity of ultra-high voltage and ultra-high voltage DC transmission, if a DC blocking fault occurs, it will simultaneously cause a large unbalanced power in the power grid at the sending and receiving end, and the impact The transient stability of the system.

[0003] Compared with the emergency control measures of the AC system, the emergency power support (EDCPS) of the non-fault DC system is used to improve the transient stability of the AC system under high-power shock disturbance, the control cost is lower, and the control is faster and more reliable. For the overload capacity ...

Claims

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