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News

INTERSOLAR 2014:新型自损耗逆变器

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CIRCUTOR will present its new self-consumption inverter ISTG with storage management functions at Intersolar 2014 (Munich)

Between June 4 and 6, CIRCUTOR will also exhibit the new range of self-consumption kits with zero injection into the grid and the photovoltaic canopies for car parks and electric vehicle charging solutions, together with additional product innovations at its stand.

We invite you to visit us at Booth 455, Hall B3

  Self-consumption inverter with storage management functions

 

Self-consumption inverter with storage management functions

The ISTG is a family of inverters for self-consuming photovoltaic installations with capacity for managing energy storage in batteries for supplying loads when the solar generator’s instantaneous power is insufficient.

More information: Inverter with accumulation MPPT management

 

是否所有的电容柜都可用?

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为什么不是任何电容柜都可以用来补偿无功电能?

正确使用调谐滤波器的重要性

在这篇文章中,我们将解释电容柜自身是如何改善电气系统的;不恰当的电容柜选择有可能会产生谐波从而破坏了系统的稳定性;系统中的电容柜可能会产生严重的故障,并导致停以及不可估量的经济损失。

我们将尽量解释不通的调谐频率以及由于调谐中不恰当的选择所导致的一系列后果,以及避免这些可能存在的这些风险的建议。

使用电容柜后提升的电能效率

提高电能效率的研究以及电费的增长,促使采用电容柜来提高功率因数越来越普遍。但是,和所有的电气设备一样,电容柜的安装也会对所在系统产生一系列的电气影响。和修正系统无功电能损耗一样重要的影响是,它们会改变电网中的谐波。这一变化可能对功率因数校正中期产生负面影响,系统中的电气不稳定,甚至生产停工。

电气系统目前变得越来越复杂,包含了不同的感性负载,容性负载以及大功率电器。这些电网通常包含了大量的谐波失真,这使得大多数电容柜生产商一致为这样的网络设计了对应的产品。

在电容柜中调谐频率的重要性

然而,无论是在电容柜或者适用于失谐滤波器的固定补偿设备,并不存在调谐频率的统一标准。

对于不常见的第三次谐波(150Hz,在50Hz电网下),通常使用134Hz的失谐滤波器(过电压因数p=14%);但是在大多数系统中,电容柜必须配合失谐滤波器用于五次谐波(250Hz,在50Hz电网下)或者更高,这是由更常见的谐波电流所产生的,换句话说,三相负载在输入时适用于6脉冲二极管整流器:速度或频率发动机,交流直流转换器,感应炉等,各式各样的调谐频率有显著的变化,活动范围在170 和215 Hz (p = 8.7% to p = 5.4%)之间。

但是,有两种调谐有别于其他:对应电压因数在 p = 7% (调谐频率 189 Hz,在 50 Hz 电网下) 以及 p = 5.67% (调谐频率 210 Hz ,在 50 Hz 电网下)。

从以上描述中可以很容易的推断出选择 p = 7% 或 p = 5.67% 可能是无所谓的,当他们介入电网后,可以获取相同的结果,但这是不正确的。

失谐滤波器以及其对系统的作用

为了论证最后的这一观点,我们将会简短的说明失谐滤波器的工作原理。观察一个标准电抗串电容的阻抗频率图 p = 7% (Fig. 1中的绿线),我们可以看到最低的阻抗在189 Hz,然而响应的 p = 5.67% (Fig. 1中的红线)最低的阻抗是210Hz。在两种情况下,阻抗在两变逐步增加,特性为阻抗为容性并且频率低于189Hz,感性在更高的频率。正式这种感性带有五次或更高谐波频率的特性预防了在任何这些频率产生共振现象的可能。
但另一个用于正确运行失谐滤波器的重要参数是事前所述的不同谐波频率的阻抗值。
因此,在所述 Fig. 1 阻抗频率下,各调谐阻抗差异在谐波频率为250Hz下时清晰可见,我们知道这是电压主要频率和/或电网中的频率谐波。在 p = 5.67% 时,阻抗值实际上为 p = 7% 时的一半。

Fig. 1 Impedance-frequency graph of a detuned filter with p = 7% (189 Hz) and p = 5.67% (210 Hz)

Fig. 1p = 7% (189 Hz) 和 p = 5.67% (210 Hz)失谐滤波器阻抗频率图

两种调谐阻抗差异的主要结果是什么?很容易的得出电网中的谐波电流吸收p = 5.67% 会高于 p = 7% 。从获利角度理解,如果系统要减少5次谐波电流等级,在上游连接点将电容柜接入电网,与一个类似的p = 7% 型电容柜调谐相比会更低;但是,依据大多数电网的经验和实际情况,与理想电网相差很大,意味着这种观念在大多数时候是不正确的。

无源滤波器的使用是需要逐步研究的课题,它们的性能取决于电网特性。因此,为了使用其一定程度上达到调谐210Hz的目标,应调谐到225Hz,这是50Hz电网下用于5次谐波电流吸收滤波器的常见频率,也应该但很少被考虑进去。简而言之,在接入到同一电网的情况下,更多时候无法判定带有 p = 5.67% 滤波器的电容柜以及 p = 7% 的相同电容柜之间的实际的谐波电流损耗。

滤波器调谐的其他作用

同样还有其他需要考虑的要素。最基本的是如果一开始 p = 5.67% 存在大量的谐波电流损耗,电容串电抗的组合必须可承受足够的过载以承受振动以及过热问题;这是我们滤波器面临的的首要问题。在电抗器特殊的情况下,当同样的 p = 7% 时,并且是按照该值做方案的,结果是可以使用体积较小较轻的电抗器,或降低成本,同样可以应用于电容器,当p = 7%时,在某种意义上它们承受的过电压将会减少25%,因此使用较低额定电压的电容器是合理的。总之,电容柜使用较弱的元器件承载较高等级的谐波过载是有风险的,这将会导致比元器件p = 7%时更快的衰减。

还需要考虑的问题是,也是CIRCUTOR认为最重要的一点,即电容器在电容电抗调谐组合里的重要性,依据 Fig. 2 中的公式。

Fig. 2 Formula for calculating the resonance frequency of an L-C series circuit

Fig. 2 L-C电路共振频率计算公式

很容易推断出电容容量的减少会增强系统中的共振频率。电容器元器件容量会在使用中任何一种因素的影响下(电压,温度,投切操作频率等),或由于介质聚丙烯的自然老化随着时间的增加而衰减。容量在 p = 5.67% 和 p = 7% 的滤波器同样会有衰减,第一种会比第二种更接近5次谐波,约接近5次谐波,吸收的谐波电流越大,将会承受更多的过载,导致不良循环。换句话说, p = 7% 滤波器给出的电容衰减安全余量更高。

正确选择电容柜的结论

该情况下的结论是明确的,CIRCUTOR明确建议在谐波失真系统需安装滤波器时使用 p = 7% 的滤波器代替 p = 5.67% 的滤波器。

这一建议的目的正式减少显而易见的电容器衰减导致严重的可见风险例如初期的电容柜过电流,在进行相关维护操作之前保证更长的工作时间,这是在任何系统中都最值得推荐的,必须在损坏发生进行测量校正。

阿尔梅里亚宝马经销商光伏发电屋顶

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CIRCUTOR supplies a solar canopy for charging electric vehicles to a BMW dealer in Almeria

PREMIUM Almería (official BMW and MINI dealer) and PROCONSULT, (Proyectos & Consulting Almería) open new renewable energy installations.

CIRCUTOR participated in the project by supplying the unit, a solar canopy for charging electric vehicles which, intelligently, supplies clean energy to the electric car and the entire BMW dealer.

CIRCUTOR offers solutions that can be adapted to every type of car park. The solutions can operate autonomously and enable specific functions thanks to software, which is adapted to each installation. The installed system has total power of 22 kWp and estimated annual production of 31,000 kWh, which will allow vehicles to travel more than 150,000 km per year. It also reduces CO2 emissions by more than 10 tonnes per year.

The energy efficiency systems will be started up on 30 May at 19:30 at the dealers in Huércal de Almería. The event, organised by BMW and PROCONSULT, will be attended by Mr. Ferrán Gil, Manager of CIRCUTOR and Mr. Pere Soria, responsible for the Renewable Energies Area.


For more information and examples about self-consumption installations, you can visit here our section.
Consult our Guide for legalising solar photovoltaic energy installations for self-consumption without injecting excess energy into the mains.

CIRCUTOR PRIME PLC 集中器及其成功的关键

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What does it mean for electricity distribution companies to have a completely approved PLC PRIME concentrator? Which PRIME PLC Concentrator has most successfully passed the independent tests of the Energy Technology Institute (ITE)?

In this article we will see how, in addition to having complete approval, it is essential to obtain the best results in a series of tests, performed by a top independent entity like the ITE. These tests are also focused on the parameters of most interest to distribution companies: the concentrator should offer maximum energy meter availability, regardless of who makes the smart meters.

Concentrator PLC PRIME SGE-PLC1000

PRIME PLC concentrator SGE-PLC1000 of CIRCUTOR completely approved

Why are we sure that the CIRCUTOR concentrator will meet all of your needs?

  • Because of its results in the STG-DG Test

    • Because CIRCUTOR's SGE-PLC1000 concentrator has been CERTIFIED by the external DNV-GL (KEMA) laboratory: DNV-GL's development makes it a landmark laboratory that is widely renowned in the PRIME Alliance, establishing itself as the only laboratory that grants this certification.

  • Because for CIRCUTOR, RELIABILITY is a key factor: The CIRCUTOR concentrator was the first concentrator to pass the tests with zero errors. We offer the market the most solid and reliable unit, proven with data entirely from outside our company (DNV-GL (KEMA).

  • For the results in the ITE tests

    • Because according to the results of the test (ITE), CIRCUTOR offers the BEST CONCENTRATOR ON THE MARKET: The SGE-PLC1000 concentrator was recently subjected to the  interoperability test (Test A) at the Energy Technology Institute (ITE),, the purpose of which is to assess its behaviour by connecting hundreds of energy meters produced by different manufacturers to create a benchmark of the concentrators currently available on the market.

The PRIME PLC concentrator is completely approved

With the complete approval of the PRIME PLC concentrator SGE-PLC1000 of CIRCUTOR energy distribution companies, have a unit that offers maximum reliability and safety when collecting data and managing a network of smart meters.

This concentrator has achieved all of the certifications required by the PRIME Alliance, and has passed all of the different tests specified by the different utilities.

The PRIME PLC concentrator has passed IBERDROLA's STG-DC conformity tests performed by DNV-GL (KEMA)

What is the STG-DC test?

The STG-DC is the test that ensures the implementation of the communications protocol between the concentrator and the telemanagement system (STG) used by a utility.

The test consists of simulating utility telemanagement software, which makes a series of requests to the concentrator to examine the behaviour of the concentrator.

Concentrator interconnectionConcentrator interconnection with an energy meter network by PLC and STG systems

Therefore, in addition to being completely approved, CIRCUTOR was the first manufacturer to pass the IBERDROLA STG-DC conformity test for its SGE-PLC1000 concentrator with PRIME PLC technology for reading and managing smart meters. After a long approval process established and standardised by IBERDROLA, we are proud to report that it is fully certified for PRIME PLC applications.

Summary of the report on the IBERDROLA STG-DC conformity certification test performed by DNV-GL (KEMA) on the CIRCUTOR SGE-PLC1000 PRIME PLC concentrator

test-certificacion

Obtaining this certification for the PRIME SGE-PLC1000 Concentrator is another step towards the standardisation and interoperability of the PRIME system, which is used by a great many energy distribution companies both in Spain and abroad.

The PRIME PLC concentrator has achieved the maximum qualification in “Test A”, performed by the ITE

The ITE test attempts to reproduce the real conditions of electrical distribution lines with energy meter centralisation, representative wiring lengths, different levels of attenuation and injection of attenuating noise.

For CIRCUTOR the results achieved were truly satisfying. Specifically in the two most important categories for electrical energy distribution companies:

  • SGE-PLC1000 achieved an index of 100% in topology (the best benchmarking score). In other words, all of the energy meters remained permanently connected to the concentrator during the days of the test. The official results produced by the ITE can be seen in the table below:

Topology: Average availability (energy meters connected) = 100%

disponibilidad-100

  • SGE PLC1000 achieved a mean availability index in the long cycle test of 98.95% (the best benchmarking score). The long cycle test continuously and repeatedly requests loading curves for the energy meters connected to the concentrator. The official results produced by the ITE can be seen in the table below:

Long cycles: Average availability (energy meters connected) = 98,95%

availability-9895

comparative benchmarking of PRIME Concentrators

Summary of comparative benchmarking of PRIME Concentrators showing the two most important categories for utilities (Column A: CIRCUTOR PRIME PLC concentrator). Irrelevant data eliminated for greater clarity.

Other certifications achieved which complete the series of tests required for the approval of the concentrator are:

  • EN-50065, performed by the LABEIN certified laboratory. Referring to tests on the transmission of signals over the low voltage electrical network in the frequency band of 9-95 kHz (A PRIME Band).

  • PRIME test performed by DNV-GL (KEMA). Ensures interoperability at the PRIME level.

  • Mechanical, electrical and climatic tests performed by the APPLUS and LRIC certified laboratories.

Conclusions for distributors and utilities

To take a correct reading of the energy meter network,, any distributor and electrical company must ensure that PRIME concentrator units have:

  • Complete approval by the PRIME Alliance,

  • the best results in a series of tests, performed by a top independent entity.

  • Furthermore, these tests should be focused on the parameters of most interest to distributors and utilities:: maximum energy meter availability, regardless of who manufactures the smart meters.

As we have seen in this article, the PRIME PLC Concentrator SGE-PLC1000 from CIRCUTOR perfectly meets these requirements.

pdf Download this article in PDF format

通过Recargo和E.ON的新型电动车充

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The energy company E.ON has received an award for one of "The 100 Best Ideas" by the “Recargo” photovoltaic charging project for vehicles. The project is a collaboration with other companies Urbaser and CIRCUTOR, and it is the third year that E.ON has received this electric mobility award.

The project is an innovative solution in Europe for managing electric vehicle charging in companies, using the sun as a source of energy for instantaneous self-consumption. This project was carried out at the installations of Urbaser with the technological collaboration of CIRCUTOR.

Image of the installations of the Recargo project at the Urbaser plant in Barcelona

Image of the installations of the "Recargo" project at the Urbaser plant in Barcelona

Optimum photovoltaic charging results

The photovoltaic charging solution can result in savings of €3,200 a year, with an annual return on investment of 4.5%, in addition to saving nearly a tonne of CO2 emissions per year. In this sense, it is not only a tool for saving money, but for rationalising energy use, better operational management and better environmental friendliness.

All about the vehicle charging solution

Energy measurement and control units (CIRCUTOR EDS and EDS 3G, CVM analyzers were used to control photovoltaic generation and energy use. Once the measurements were taken, the data was analysed and monitored using PowerStudio SCADA energy management software.

The Energy Report presents the energy generated and consumed by the different system elements, indicating the total energy generated or consumed over specific periods of time.
The Energy Report presents the energy generated and consumed by the different system elements, indicating the total energy generated or consumed over specific periods of time.

The solar kit: self-consumption solution for all types of installations

CIRCUTOR has developed modular solar energy solutions (self-consumption solar kit)to provide an instantaneous self-consumption solution with energy savings to the general public. These solutions are especially designed for small and medium-scale installations and are available through any sales channel. They also include the necessary components to comply with regulations on photovoltaic installations for instantaneous self-consumption.

Image of the second day of sizing self-consumption installations with solar photovoltaic energy at CIRCUTOR on March 21
Image of the second day of sizing self-consumption installations with solar photovoltaic energy at CIRCUTOR on March 21

 

Due to growing interest in instantaneous self-consumption in Spain, CIRCUTOR is offering information seminars on self-consumption and training sessions, to support technicians and development managers in these types of installations. You can look up the dates for the seminars and training sessions on the CIRCUTOR website. The Legalisation guide for instantaneous self-consumption installations is also available. You may also contact CIRCUTOR by sending an e-mail to central@circutor.com.

You can also follow our publications through the CIRCUTOR Twitter account, and in Linkedin.
For more information and examples of self-consumption installations, please refer to this special section.

新型解决方案用于漏电保护

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Continually innovating in earth leakage protection and monitoring

CIRCUTOR offers units that self-manage anomalous and random situations in electric installations, minimising the effects of electric shut-downs and fostering energy savings.

- REC3C: RCCB with self-reclosing earth leakage switch. Maximum continuity.
- RGU-2: Electronic monitoring and earth leakage protection relay. Intelligent protection within your reach.
- RGU-10B: Type B electronic earth leakage monitoring relay. Full monitoring within your reach.
- REC max: New range of reclosing devices. Earth leakage and circuit breaker protection with automatic reclosing systems, telemanage your installation.

More information: New solutions for EARTH LEAKAGE PROTECTION

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联系方式

CIRCUTOR, SA
Vial Sant Jordi s/n, 08232
Viladecavalls (Barcelona) Spain
Tel: (+34) 93 745 29 00
Fax (+34) 93 745 29 14

技术支持

(+34) 93 745 29 19

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