水电与新能源
水電與新能源
수전여신능원
HYDROPOWER AND NEW ENERGY
2014年
12期
72-75
,共4页
额定电流%电容电流%配合关系%继电保护%过电压
額定電流%電容電流%配閤關繫%繼電保護%過電壓
액정전류%전용전류%배합관계%계전보호%과전압
rated current%capacitance current%coordination relationship%relay protection%over voltage
风电场35 kV系统接地变中性点电阻器额定电流通常相对偏低。当集电线路发生经电阻单相接地故障时，集电线路继电保护装置往往难以动作成功。针对该问题，根据电网继电保护运行整定规程，结合电网故障波形，分析了集电线路继电保护装置难以动作成功的原因。在此基础上，提出了中性点电阻器额定电流与电网电容电流的配合关系，并应用于现场，有效提高了风电场集电线路的供电可靠性。
風電場35 kV繫統接地變中性點電阻器額定電流通常相對偏低。噹集電線路髮生經電阻單相接地故障時，集電線路繼電保護裝置往往難以動作成功。針對該問題，根據電網繼電保護運行整定規程，結閤電網故障波形，分析瞭集電線路繼電保護裝置難以動作成功的原因。在此基礎上，提齣瞭中性點電阻器額定電流與電網電容電流的配閤關繫，併應用于現場，有效提高瞭風電場集電線路的供電可靠性。
풍전장35 kV계통접지변중성점전조기액정전류통상상대편저。당집전선로발생경전조단상접지고장시，집전선로계전보호장치왕왕난이동작성공。침대해문제，근거전망계전보호운행정정규정，결합전망고장파형，분석료집전선로계전보호장치난이동작성공적원인。재차기출상，제출료중성점전조기액정전류여전망전용전류적배합관계，병응용우현장，유효제고료풍전장집전선로적공전가고성。
Usually, the rated current of neutral-point grounding resistor in the 35 kV system in wind power stations is relatively low .When a single-phase grounding fault occurs in the power collecting lines , relay protection devices in the power collecting lines are often difficult to operate well .Therefore , possible reasons for this problem is analyzed based on the operation setting regulation of grid relay protection and the fault waveform of the grid .A coordination relationship between the rated current of neutral-point resistor and the grid capacitance current is proposed , which has been applied and effectively improves the power supply reliability of the power collecting lines in 35 kV wind power system .
