Language
- 中文版
- English

Photovoltaic energy storage industry

With the increase of photovoltaic module current and the continuous increase of inverter power, the safety issues of photovoltaic power plants have become particularly prominent. How to ensure the system safety of photovoltaic power plants and improve their operational efficiency has become an important issue for Jingsi's photovoltaic solutions.

Home page

In recent years, with the maturity and progress of photovoltaic industry technology, driven by numerous factors such as rapid economic development, policy support, and technological progress, the global installed capacity of solar photovoltaic power generation has continued to increase. The development of the photovoltaic industry has shifted from policy driven to endogenous driven, and solar photovoltaic power generation will occupy an important position in energy consumption. Since the release of the "dual carbon" policy, China's clean energy transformation has been in the ascendant, and global photovoltaics are also in full swing. According to IRENA's prediction, it is expected that the cumulative installed capacity of photovoltaics worldwide will reach 5200GW by 2030 and 14000GW by 2050, becoming the absolute main energy source. However, while photovoltaics are developing rapidly, there are still many challenges to be solved.

Traditional solutions

Reverse connection, current reversal, and busbar short circuit are common faults in photovoltaic power plants. At present, the traditional solution is to install an isolation switch between the photovoltaic module and the inverter. When a fault occurs, people need to manually open and close the switch on site to troubleshoot the fault. The switch itself does not have active protection function. When there is an internal fault or component short circuit in the inverter, traditional switches often cannot be disconnected, and there is a safety hazard of ignition at the short circuit point.

KingSi solutions

Based on the analysis of customer pain points and the grasp of technological trends, Jingsi Innovation has launched a one-stop solution for photovoltaic scenarios. Through the KSiG1-50 series intelligent trip switch, the trip signal emitted by the inverter can be identified, and millisecond level fault current can be broken, achieving a transition from "passive protection" to "active safety".

Reverse string connection: When the switch is closed, the reverse string connection will form a circuit with other branches in its corresponding MPPT. The input voltage of the photovoltaic string is usually close to 0, and the input current is reverse, which is the short-circuit current corresponding to the string under current irradiation. After the inverter makes a logical judgment of string reversal based on electrical parameters, it issues the breaking command KSiG1 to quickly break.

Current backflow: When the string voltage of one branch in MPPT exceeds the open circuit voltage of another branch string, the string will experience backflow current. The inverter will make logical judgments based on electrical parameters, and then issue a breaking command.

Bus short circuit: When the voltage of the DC bus/half bus rapidly drops from the normal value to the critical value, the inverter will detect a bus short circuit fault and immediately issue a breaking command to disconnect all DC current.

As a one-stop photovoltaic solution provider, Jingsi achieves industry-leading safety protection through high-performance intelligent release switches, adapts to high safety scenario requirements, solves many challenges and scenario requirements faced by the comprehensive promotion of photovoltaic, and helps Qianxing Baiye enter a new era of green and low-carbon.