基于向量计算的母线保护负序电压闭锁校验方案研究

Verification Scheme of Negative Sequence Voltage Blocking for Busbar Protection Based on Vector Computation

针对母线保护复合电压闭锁中负序闭锁电压校验的问题,基于向量计算法研究了母线保护负序电压的分解和计算,并提出了一种母线保护负序电压闭锁的简化校验方法。通过只调整B和C相电压幅值,改变负序电压的大小,同时使零序电压及相电压满足闭锁要求,且不发生抢动现象。通过搭建试验平台,对该校验方案进行了验证。

In order to solve the problem of negative-sequence blocking voltage verification in bus protection complex voltage blocking,the decomposition and calculation of negative-sequence voltage of bus protection are studied based on vector calculation method,and a simplified verification method of negative-sequence voltage blocking is proposed.By adjusting only the B and C phase voltage amplitude,the negative sequence voltage is changed,and the zero sequence voltage and phase voltage meet the locking requirement,and no snatch phenomenon occurs.The test platform is set up to verify the verification scheme.