| 引用本文: | 刘其辉,赵亚男,毛未.分散式风电AVC策略[J].电力自动化设备,2017,37(8): |
| LIU Qihui,ZHAO Yanan,MAO Wei.AVC strategy for distributed wind-power[J].Electric Power Automation Equipment,2017,37(8): |
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| 摘要: |
| 传统的自动电压控制(AVC)策略主要针对风电场，且其关注点仅仅为并网点或远端单节点电压情况，并不适用于分散式风电，为此提出了改进AVC策略。改进的AVC策略选取配电网电压偏差最严重的节点作为控制节点进行无功整定得到无功指令值。结合分散式风电多点接入的特点并综合考虑多种分配算法，将无功分配算法分为3个层面：不同节点之间按灵敏度大小进行无功指令值分配；同一节点不同机组之间按机组无功容量分配无功指令值；双馈机组内部定子侧优先分配无功指令值。通过算例仿真验证了改进AVC策略的有效性与可靠性。与传统的AVC策略相比，改进AVC策略能够根据分散式风电接入配电网方式较为灵活的特点，充分利用多台风电机组的无功输出能力，有效地改善配电网电压水平。 |
| 关键词: 分散式风电 无功电压 自动电压控制 配电网 |
| DOI：10.16081/j.issn.1006-6047.2017.08.027 |
| 分类号:TM614 |
| 基金项目:国家电网公司科技项目(SGSDDK00KJJS1500155) |
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| AVC strategy for distributed wind-power |
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LIU Qihui, ZHAO Yanan, MAO Wei
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State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China
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| Abstract: |
| Since traditional AVC(Automatic Voltage Control) strategy is mainly applied in wind farm and only concerns the voltage of grid-connecting point or single far-end node, an improved AVC strategy is proposed for the distributed wind-power, which takes the node with the most serious voltage deviation as the control point to calculate the reactive power reference. According to the multiple integrating points of distributed wind-power and considering various distribution algorithms, the calculation of reactive-power distribution is divided into three layers: the reactive-power reference distribution among different nodes according to their sensitivities, the reactive-power reference distribution among different units according to their reactive-power capacities, and the prior reactive-power reference distribution to the stator side of DFIG unit. Case simulations verify the correctness and reliability of the improved AVC strategy. Compared with traditional AVC strategy, the improved AVC strategy fully uses the reactive-power output abilities of multiple wind units based on the flexible integration of distributed wind-power to effectively improve the voltage level of distribution network. |
| Key words: distributed wind-power reactive power and voltage AVC distribution network |
