交流三相表电表在越南光伏的应用

安科瑞 于洋

Application of Acrel AC Three Phase Energy Meter in Vietnam Solar System

摘要:本文介绍了PZ96L和AMC96L在越南光伏逆变器上的应用。目前，电网公司通常要求光伏并网系统为不可逆流发电系统，即光伏并网系统所发的电由本地负荷消耗，即自发自用。在并网发电和储能系统中，由于外部环境是不断变化的，为了防止光伏并网系统逆向发电，系统需要进行逆流检测，通过实时监测配电变压器低压出口侧的功率信号来调节系统的发电功率，从而达到光伏并网系统的防逆流功能。

Abstract:This article introduces the application of PZ96L and AMC96L in Vietnam photovoltaic inverters. Right now, grid companies usually require photovoltaic grid-connected systems to be irreversible , that is, the electricity generated by photovoltaic grid-connected systems is consumed by local loads, and excess electricity is not allowed to supply to the grid. The system can regulate power generation in order to prevent the photovoltaic grid-connected system from generating reverse power.

1.项目概述 Project overview:

一家做光伏发电的公司，在确认了我司PZ96L和AMC96L的协议可以跟他们目前使用的太阳能逆变器对接后，选择购买这两款表来作为光伏交流部分的电量统计，来确保不会把光伏产生的电流输送向国网。  

The photovoltaic power generation company in Vietnam, after confirming that our company’s PZ96L and AMC96L protocols can be connected to their current solar inverters, they chose to purchase these two models as the electricity statistics of the photovoltaic AC part to ensure that the electricity generated by photovoltaic will not be sent to the state grid.

系统拓扑：Structure

光伏防逆流解决方案：Solution for PV anti-backflow

光伏直流耦合储能解决方案 Solution for PV DC coupled energy storage

光伏交流耦合储能解决方案 Solution for photovoltaic AC coupled energy storage

 2.相关产品：Product Selection

防逆流 Anti-reflux

产品特点：Functions

双向计量光伏系统的发电量，计量上网电量和用电量

250ms数据刷新率

开口式互感器，支持300A电流。

通过RS485和并网逆变器或储能逆变器通讯，实现防逆流功能及充放电的逻辑控制。

Measure power generation and the use of electricity,

Data refresh rate: 250ms,

Split core CT, 300A current,

Communication: RS485 and grid-connected inverter or energy storage inverter

证书：Certificate

AGF-AE-D：

ACR10R：

AMC96L

产品特点：

PZ系列电能表，采用交流采样技术，可同时测量三相电网电气参数，如电流、电压、功率、电能等直接或间接的。可用于就地显示，与控制设备连接构成测控系统。配备RS-485通讯口，采用兼容的Modbus-RTU协议，仪表可将电参量信号转换为标准模拟量输出，具有四路（两路）切换输入/两路切换输出。

PZ Series electric energy meters, adopting AC sampling technology, can measure many three phase grid electrical parameters such as current, voltage, power, electric energy etc. directly or indirectly. It may be used for local display, and connected with the control equipment to form measuring and controlling system. Fitted with RS-485 communication port, adopting compatible Modbus-RTU protocol, meters can switch electric parameter signal into standard  analog output, with four-channel (two-channel) switching input / two-channel switching output.

根据不同的需求，通过面板上的按键，可以对变比、报警、通讯等电气参数进行设置和控制。 PZ系列仪表具有较高的性价比，可以简单地替代传统的电换能器和测量仪表。该电表作为一种*智能化、数字化前端采集元件，广泛应用于各种控制系统、SCADA系统和能源管理系统 

Based on different requirements, by keys on the faceplate, electric parameters for transformation ratio, alarm, communication etc. can be set up and controlled. PZ series meters have extra high price performance ratio, can simply replace traditional electric transducer and measuring meters .As an advanced intelligent, digital front end acquisition component, this electric meters have widely used in various control system, SCADA system and energy source management system.

DJSF1352-RN直流计量 DJSF1352-RN DC Energy Meter

DJSF1352/RN

产品特点：Functions

精度1级，带±12V 电压输出用于霍尔传感器供电

红外通讯接口和RS485通讯接口，Modbus-RTU和645规约

导轨结构，4模体积小巧方便安装

支持分流器或霍尔传感器输入方式

Accuracy: 1, voltage output: ±12V

Communication: infrared and RS485 communication, Modbus-RTU and 645 protocol

DIN rail installation

Support hall sensor or shunt input

3.集中式光伏解决方案Centralized PV solutions

应用说明：Application

在太阳能光伏发电系统中，智能光伏汇流箱减少了太阳能光伏电池阵列与逆变器之间的连线。智能光伏汇流箱可以监测光电池阵列中电池板运行状态，组串电流，防雷器状态、直流断路器状态。装置带有RS485接口可以把测量和采集到的数据和设备状态上传。

In the solar PV power generation system, the smart PV combiner box reduces the connection between the solar PV cell array and the inverter. The box can monitor the operating status of the solar panels, lightning protector and DC circuit breaker. With RS485 interface, the device can upload the measured and collected data and equipment status.

系统拓扑：Structure

4.相关产品：Product Selection

1.AGF系列汇流采集装置 AGF Series Confluence Acquisition Device

产品特点：Functions

一次电流采用穿孔方式接入，可达20A，穿孔方式接入，安装方便，安全性高

带3 路开关量状态监测，可以对汇流箱内的防雷器、断路器状态进行监控

具有内部测温功能，可实时监测箱内温度，保证电气安全

具有DC 1500V母线电压测量功能

可就地显示/液晶显示头，方便调试维护

Current specification: 20A, perforation connection

3 DI

Temperature measurement

Busbar voltage measurement： DC 1500V

LCD display

证书：Certificate

2．APQM电能质量分析装置：APQM Power Quality Monitoring Device

APQM电能质量分析装置可用于光伏并网电能质量监测

产品特点：Functions

稳态数据测量（电参量、谐波、间谐波、电压波动、闪变）

暂态数据监测（电压暂升、暂降、中断）

统计功能（电能质量越限次数，电压合格率，自动生成报表）

Measurement of electrical parameters, harmonics, inter-harmonics, voltage fluctuation, flicker,

Monitoring of voltage swell, voltage sag, voltage interruption,

Statistics of power quality limit times, voltage qualification rate, and form the report.

参考文献Bibliography 
1.Photovoltaic system solutions 2021.4

2.PZ Series programmable intelligent meters