To address the issue of meeting the non-contact detection requirements for zero-value insulators in transmission lines

this paper develops an integrated optical electric field sensor based on the transmissive transverse modulation Pockels effect. By employing a side packaging technique

the issue of dielectric mismatch is avoided

realizing high-sensitivity and multi-range probe miniaturization. The sensor has a cross-section of only 5 mm×5 mm

a measurement range of 0.04~33 kV/cm

and a maximum sensitivity of 1.219 2 mV/(kV·m-1). A signal self-compensation algorithm is proposed to suppress the relative errors induced by light source fluctuations

realizing broadband frequency responses from 5 Hz to 100 kHz. Moreover

an electric field simulation model of a 110 kV insulator string is established

revealing the characteristics and causes of two types of electric field distortions induced by zero-value insulators: failure at the ends results in an overall elevation of the field strength distribution curve

while failure in the middle creates a local valley. The experimental results show that the field strength distribution at a distance of 5 cm from the shed aligns with the simulation trends

effectively identifying the location of zero-value insulators. The research results can provide some reference for the non-contact detection of zero value insulators.