Recently, the National Energy Administration issued the "Management Measures for the Development and Construction of Distributed Photovoltaic Power Generation", which implements classified management of distributed photovoltaic projects and clarifies the requirements for construction sites, access voltages, installed capacity and consumption methods. The document divides distributed photovoltaics into four categories: natural household use, non-natural household use, general industry and commerce, and large-scale industry and commerce. Among them, industrial and commercial projects need to be reasonably allocated according to the proportion of spontaneous self-use, and strictly restrict counter-current and unplanned Internet access.
General industrial and commercial projects can choose the mode of "all spontaneous self-use" or "spontaneous self-use, surplus power grid", and the proportion of surplus power grid is set by the local competent departments according to the grid consumption conditions. In principle, large industrial and commercial projects implement "all spontaneous self-use", and surplus power grid is not allowed. After the implementation of the New Deal, photovoltaic systems put forward higher requirements for surplus power metering, anti-reverse current control and real-time monitoring. CHIPSENSE will follow them.

CHIPSENSE Accurate measurement to ensure excess power online compliance

In the "spontaneous self-use, surplus power grid" mode, the photovoltaic system needs to monitor the power generation and power load in real time to accurately measure the surplus power grid power. CHIPSENSE AS1V series open-loop Hall current sensor of CHIPSENSE has excellent linearity and ± 1% accuracy. The output signal is stable, and the response time is as fast as 3-5 µs. It can capture the output current fluctuation of the inverter in real time to ensure the authenticity and reliability of the measurement data.

CHIPSENSE AS1V series current sensor adopts + 5V power supply, analog voltage output, zero voltage is VCC/2, supports two-way measurement, and is suitable for DC, AC and pulse current monitoring. The product has a frequency band width of 50kHz, which can cover the common current frequency of the output terminal of the photovoltaic inverter, meet the real-time measurement needs under dynamic working conditions, and ensure that the process of surplus power connection is legal and the data can be traced.

Real-time monitoring for anti-revere control

CHIPSENSE in order to response the requirement that large-scale industrial and commercial projects are strictly prohibited from surpluses, CHIPSENSE AS1V series current sensors can monitor the bus current flow and power in real time. When the counter current trend is detected, the system can output signals through the sensors, link the circuit breaker or control module, quickly cut off the grid-connected channel, avoid power back flow to the public power grid, and ensure project compliance access.
Open-loop design structure of CHIPSENSE current sensor, no need to connect the bus in series, eliminate voltage drop or additional loss. 3.6kV power frequency withstand voltage and 6.6kV pulse withstand voltage performance, meet CATIII 600V isolation requirements, have excellent insulation protection ability, adapt to industrial and commercial complex power environment.

Industrial-grade standards to meet the needs of grid-connected applications

CHIPSENSE AS1V series current sensor meets EN 50178, IEC 61010-1 and UL 508C international standards, the housing material reaches UL94-V0 flame retardant grade, the product design is compact, the through hole size is 20.5 × 10.5mm, which is convenient for inverters, anti-revere flow devices and metering boxes. Its excellent temperature drift characteristics and long-term stability ensure stable measurement data under the long-term operation of photovoltaic systems and avoid offset errors form CHIPSENSE.

With its excellent response speed, measurement accuracy, and electrical insulation capabilities.

CHIPSENSE AS1V series current sensor has been widely used in key equipment such as photovoltaic inverters, grid-connected cabinets, residual power monitoring devices, and anti-counter current controllers, making it a reliable solution to meet the high-standard grid-connected needs of industrial and commercial photovoltaic projects under the New Deal.

CHIPSENSE is a national high-tech enterprise that focuses on the research and development, production, and application of high-end current and voltage sensors, as well as forward research on sensor chips and cutting-edge sensor technologies. CHIPSENSE is committed to providing customers with independently developed sensors, as well as diversified customized products and solutions.

“CHIPSENSE, sensing a better world!

www.chipsense.net