电力系统保护与控制
電力繫統保護與控製
전력계통보호여공제
POWER SYSTM PROTECTION AND CONTROL
2014年
22期
90-94
,共5页
隆茂%李田刚%安然然%王奕%张哲%鲁功强
隆茂%李田剛%安然然%王奕%張哲%魯功彊
륭무%리전강%안연연%왕혁%장철%로공강
输电线路%参数对称性%距离保护%测量阻抗%误差分析
輸電線路%參數對稱性%距離保護%測量阻抗%誤差分析
수전선로%삼수대칭성%거리보호%측량조항%오차분석
transmission line%parameter symmetry%distance protection%measured impedance%error analysis
不换位输电线路的参数不对称性,将会影响到基于参数对称为前提的保护的正确动作。为了研究参数不对称对于距离保护的影响,提出了不换位线路的序参数计算方法。在此基础上,通过理论推导和数字仿真,分析了阻抗继电器在各种故障情况下,不换位线路的测量阻抗的误差大小。据此,对不换位线路的距离保护整定计算提出改进建议。
不換位輸電線路的參數不對稱性,將會影響到基于參數對稱為前提的保護的正確動作。為瞭研究參數不對稱對于距離保護的影響,提齣瞭不換位線路的序參數計算方法。在此基礎上,通過理論推導和數字倣真,分析瞭阻抗繼電器在各種故障情況下,不換位線路的測量阻抗的誤差大小。據此,對不換位線路的距離保護整定計算提齣改進建議。
불환위수전선로적삼수불대칭성,장회영향도기우삼수대칭위전제적보호적정학동작。위료연구삼수불대칭대우거리보호적영향,제출료불환위선로적서삼수계산방법。재차기출상,통과이론추도화수자방진,분석료조항계전기재각충고장정황하,불환위선로적측량조항적오차대소。거차,대불환위선로적거리보호정정계산제출개진건의。
The asymmetry of untransposed transmission lines parameters will affect the correct operation of protection which is based on parameters symmetry. To study the line asymmetry parameters’ impact on distance protection, this paper puts forward the sequence parameter calculation method of untransposed lines. On this basis, it analyzes the error of untransposed lines measured impedance through theoretical derivation and numerical simulation, when the impedance relay is in various fault cases. In response to the measured impedance errors of untransposed lines, improvement suggestions of distance protection setting are put forward.