According to information from the State Intellectual Property Office, China Railway Eighth Bureau Group Seventh Engineering Co., Ltd.; Sichuan Fourth Construction Co., Ltd.; China Construction Second Engineering Bureau Co., Ltd. applied for a project called “A Distributed Photovoltaic Control Circuit” The patent, publication number CN121749081A, the application date is February 2026.
the patent abstract shows that the present invention discloses a distributed photovoltaic control circuit, which relates to the field of photovoltaic power supply control and includes a control unit corresponding to the number of loads. the control unit includes a plurality of switch tubes, a plurality of resistors, a plurality of operational amplifiers and a plurality of diodes. in the plurality of switch tubes, the gate of p-type MOS tube Q2 is QFA_COIL connected with one end of resistor R7, the gate of p-type MOS tube Q3 and the coil of circuit breaker QFA, the source is connected to the normally closed terminal NC of the circuit breaker QFA, and the drain is connected to the anode of the diode D1 and one end of the resistor R1. The common terminal C of the circuit breaker QFA is connected to the power supply, and the normal start NO is connected to the gate of the P-type MOS tube Q3 and the gate of the N-type MOS tube Q1. The drain of the N-type MOS tube Q1 is connected to the other end of the resistor R7 and one end of the resistor R8.
Tianyan check data show that the Seventh Engineering Co., Ltd. of China Railway Eighth Bureau Group, established in 1997, is located in Chengdu. It is an enterprise mainly engaged in civil engineering construction. The registered capital of the enterprise is 520 million RMB. Through the analysis of big data, the Seventh Engineering Co., Ltd. of China Railway Eighth Bureau Group has invested in 7 enterprises and participated in 2209 bidding projects. There are 2 trademark information and 195 patent information in terms of property clues. In addition, the enterprise also has 219 administrative licenses.
Sichuan Fourth Construction Co., Ltd., founded in 1987, is located in Deyang City. It is an enterprise mainly engaged in civil engineering construction. The registered capital of the enterprise is 300 million RMB. Through the analysis of big data, Sichuan No.4 Construction Co., Ltd. has invested in 15 enterprises, participated in 10139 bidding projects and 125 patent information. In addition, the enterprise also has 208 administrative licenses.
China Construction Second Engineering Bureau Co., Ltd., founded in 1980, is located in Beijing. It is an enterprise mainly engaged in the housing construction industry. The registered capital of the enterprise is 10000 million RMB. Through the analysis of big data, China Construction Second Engineering Bureau Co., Ltd. has invested in 152 enterprises, participated in 30892 bidding projects, 5000 patent information, and 4241 administrative licenses.
