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公开(公告)号：KR1020110050858A
公开(公告)日：2011-05-17
申请号：KR1020090107411
申请日：2009-11-09
Applicant: 한국전기연구원
Abstract: PURPOSE: A micro-grid system and a method for controlling load in a static transfer switch are provided to protect main components of a micro-grid system by monitoring power quality. CONSTITUTION: A micro-grid system comprises plural loads, an energy storage device, an energy management system(23) and a static switch. The static switch comprises a blocking unit, a current detector, a voltage detector and a control unit, and receives the information on the micro-grid system from the energy management system. In addition, the static switch calculates the load blocking amount based on the information received from the energy management system when being switched into an independent operation.
Abstract translation: 目的：提供微电网系统和控制静态转换开关负载的方法，通过监控电力质量来保护微电网系统的主要部件。 构成：微电网系统包括多个负载，能量存储装置，能量管理系统（23）和静态开关。 静态开关包括阻断单元，电流检测器，电压检测器和控制单元，并且从能量管理系统接收微电网系统上的信息。 此外，静态开关根据从能量管理系统接收到的信息切换到独立操作时，计算负载阻塞量。
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公开(公告)号：KR101034271B1
公开(公告)日：2011-05-16
申请号：KR1020080119448
申请日：2008-11-28
Applicant: 한국전기연구원
Abstract: 본 발명은 신재생에너지원의 계통 연계의 운전 예비력 공급 시스템 및 그 방법에 관한 것으로, 신재생에너지원의 에너지 저장장치; 상기 에너지 저장장치와 직/병렬로 연결된 복수개의 DC/DC 컨버터; 상기 DC/C 컨버터를 통해 유입되는 출력을 전력계통으로 전달하는 DC/AC 인버터; 상기 DC/DC 컨버터 및 DC/AC 인버터를 제어하여, 계통 고장 발생시 계통주파수를 미리 정해진 값으로 제어 하면서 주파수 예비력을 발생시키는 제어부를 포함하는 것을 특징으로 한다.
이와 같은 본 발명을 제공하게 되면, 에너지저장장치를 상시운전하지 않고, 연계용량이 제한되는 주요 원인인 계통고장에 의한 신재생에너지전원 탈락 시에만 과도적으로 에너지를 공급함으로써, 잦은 충방전을 피하고, 상대적으로 에너지저장시스템의 용량을 줄이면서, 신재생에너지전원의 도입용량을 증대시키게 된다.
신재생에너지, DC/DC 컨버터, DC/AC 컨버터, 에너지저장장치(ESS), 운전 예비력-
公开(公告)号：KR100932502B1
公开(公告)日：2009-12-17
申请号：KR1020070123118
申请日：2007-11-30
Applicant: 한국전기연구원
CPC classification number: H02J3/38 , H02J2003/388
Abstract: A method for detecting an islanding operation of an inverter based distributed power source actively is provided to minimize an output disturbance without distorting an output current. A frequency variation is induced by using a reactive power. If the frequency exceeds the detection condition of an islanding operation, the islanding operation is detected. A reactive power output controller of the distributed power source outputs a reactive power component reference current command value. A frequency variation acceleration control loop(610) is added to the reactive power component reference current command value. The frequency variation is accelerated by the reactive power output or the change of the power factor.
Abstract translation: 提供一种主动检测基于逆变器的分布式电源的孤岛操作的方法，以使输出扰动最小化而不会使输出电流失真。 频率变化是通过使用无功功率引起的。 如果频率超过孤岛操作的检测条件，则检测到孤岛操作。 分布式电源的无功功率输出控制器输出无功功率分量参考电流命令值。 频率变化加速度控制环路（610）被添加到无功功率分量参考电流命令值。 频率变化通过无功功率输出或功率因数的变化而加速。
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公开(公告)号：KR1020090056115A
公开(公告)日：2009-06-03
申请号：KR1020070123118
申请日：2007-11-30
Applicant: 한국전기연구원
CPC classification number: H02J3/38 , H02J2003/388
Abstract: A method for detecting an islanding operation of an inverter based distributed power source actively is provided to minimize an output disturbance without distorting an output current. A frequency variation is induced by using a reactive power. If the frequency exceeds the detection condition of an islanding operation, the islanding operation is detected. A reactive power output controller of the distributed power source outputs a reactive power component reference current command value. A frequency variation acceleration control loop(610) is added to the reactive power component reference current command value. The frequency variation is accelerated by the reactive power output or the change of the power factor.
Abstract translation: 提供一种用于主动检测基于逆变器的分布式电源的孤岛作用的方法，以使输出干扰最小化，而不会使输出电流失真。 通过使用无功功率来引起频率变化。 如果频率超过孤岛作业的检测条件，则检测孤岛作业。 分布式电源的无功功率输出控制器输出无功功率分量参考电流指令值。 频率变化加速度控制回路（610）被添加到无功功率分量参考电流指令值。 频率变化由无功功率输出或功率因数的变化加速。
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公开(公告)号：KR1020080034530A
公开(公告)日：2008-04-22
申请号：KR1020060100559
申请日：2006-10-17
Applicant: 한국전기연구원
IPC: H02J3/38
Abstract: A method and a device of independently detecting an individual operation for a microgrid are provided to continuously supply power to a major load in the microgrid in connection with a microgrid operation system. A device for independently detecting an individual operation for a microgrid includes a current detector, voltage detectors(30,31), a filter(33), a buffer(34), an A/D(Analog to Digital) conversion circuit(35), a display and operation unit(36), a signal processor(37), a memory(38), and a communication port(40). The current detector detects a current flowing on a breaker(7) and supplies the detected current to the A/D conversion circuit through the filter. The voltage detectors detect voltages on both terminals of the breaker and supplies the detected voltages to the A/D conversion circuit through the filter. The A/D conversion circuit converts a current detection signal and a voltage detection signal received from the current and voltage detectors, and supplies converted digital signals to the signal processor.
Abstract translation: 提供了一种独立地检测微电网的单独操作的方法和装置，以连续地向微电网中的主要负载供电，该微电网与微电网操作系统相连。 用于独立地检测微电网的单独操作的装置包括电流检测器，电压检测器（30,31），滤波器（33），缓冲器（34），A / D（模拟到数字）转换电路（35） ，显示和操作单元（36），信号处理器（37），存储器（38）和通信端口（40）。 电流检测器检测流过断路器（7）的电流，并通过滤波器将检测到的电流提供给A / D转换电路。 电压检测器检测断路器两端的电压，并通过滤波器将检测到的电压提供给A / D转换电路。 A / D转换电路对从电流和电压检测器接收的电流检测信号和电压检测信号进行转换，并将转换的数字信号提供给信号处理器。
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Patent Agency Ranking
公开(公告)号：KR100794197B1
公开(公告)日：2008-01-11
申请号：KR1020060060198
申请日：2006-06-30
Applicant: 한국전기연구원
IPC: H02J3/38
CPC classification number: Y02E10/563
Abstract: 본 발명은 하이브리드 분산발전 시스템을 이용한 운전 제어방법에 관한 것으로서, (f) 통합감시 제어부가 직류 공통모선(A1)의 전압(Vdc)값과, 직류단 최고전압(Vdc_max) 및 최저전압(Vdc_min)을 바탕으로 제 1 분산전원부가 승압 또는 충전모드로 설정되었는지 판단하는 단계; (g) 상기 (f) 단계의 판단결과, 승압 또는 충전모드가 설정되었을 경우, 통합감시 제어부가 계수기(Cnt)를 증가시키고, 증가된 계수기의 값을 설정치와 비교하여 설정치 이상인지 여부를 판단하는 단계; (h) 상기 (g) 단계의 판단결과, 설정치 이상인 경우 즉, 일정시간이 경과한 경우, 통합감시 제어부가 계수기를 0 으로 설정하고, 승압 또는 충전모드를 실행하는 단계; (i) 상기 통합감시 제어부가 실행되는 운전이 승압모드인지 여부를 판단하는 단계; (j) 상기 (i) 단계의 판단결과, 승압모드일 경우, 통합감시 제어부가 전압기준치를 최고전압(Vdc_max) 및 최저전압(Vdc-min)의 중간 값으로 설정하는 단계; 및 (k) 상기 통합감시 제어부가 축전지의 충전상태를 검사하고 승압운전을 실행하는 단계; 로 구성된다.
하이브리드, 분산전원, 출력평준화-
47.发明授权
公开(公告)号：KR100726024B1
公开(公告)日：2007-06-08
申请号：KR1020050135022
申请日：2005-12-30
Applicant: 한국전기연구원
IPC: G05B17/02
Abstract: A device and a method for performing a system interconnection test of a renewable energy inverter are provided to perform a simulation based on a power type and a capacitance variation by changing a program coding process. A device for performing a system interconnection test of a renewable energy inverter includes an electric power simulator and an electric power amplifier(300). The electric power simulator simulates various power supply devices by using a program based on modeling and simulation processes. The electric power amplifier includes a signal implementing unit which amplifies a simulated power signal to real voltage and current waveforms, and a source voltage unit which supplies a source voltage. The electric power amplifier is connected to the electric power simulator to receive the simulated power signal and connected to a renewable energy model(100) and a system interconnection model(200). The electric power amplifier transmits the real voltage and current waveforms to an inverter.
Abstract translation: 提供了用于执行可再生能源逆变器的系统互连测试的设备和方法，以通过改变程序编码处理来执行基于功率类型和电容变化的模拟。 用于执行可再生能源逆变器的系统互连测试的设备包括电力模拟器和电力放大器（300）。 电力仿真器通过使用基于建模和仿真过程的程序来模拟各种电力供应设备。 该电力放大器包括将模拟电力信号放大为实际电压和电流波形的信号实现单元以及提供电源电压的电源电压单元。 电力放大器连接到电力模拟器以接收模拟的电力信号并连接到可再生能源模型（100）和系统互连模型（200）。 电力放大器将实际的电压和电流波形传输到逆变器。
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公开(公告)号：KR100447452B1
公开(公告)日：2004-09-07
申请号：KR1020010068872
申请日：2001-11-06
Applicant: 한국전기연구원
IPC: G01R31/00
Abstract: PURPOSE: A multifunctional inspection device for inspecting a variable load is provided to inspect and simulate electrical characteristics by using an unified device. CONSTITUTION: An inverter system portion(101) simulates a characteristic of an arbitrary load, controls a direct link voltage, and recovers the power. A control portion(102) controls the inverter system portion(101). A setup portion(103) is electrically connected with the control portion(102) in order to set up the capacity of arbitrary power and a power factor. A real-time simulation portion(104) is electrically connected with the control portion(102) in order to simulate a complicated load system. A monitoring portion(105) is electrically connected with the control portion(102) in order to monitor states of the total voltage and current of the load system. A communication-interface portion(106) is connected with the control portion(102), the setup portion(103), the real-time simulation portion(104), and the monitoring portion(105).
Abstract translation: 目的：提供一种用于检测可变负载的多功能检查设备，通过使用统一的设备来检查和模拟电气特性。 构成：逆变器系统部分（101）模拟任意负载的特性，控制直接链路电压并恢复电力。 控制部分（102）控制逆变器系统部分（101）。 设置部分（103）与控制部分（102）电连接，以设定任意功率和功率因数的容量。 实时模拟部分（104）与控制部分（102）电连接以模拟复杂的负载系统。 监视部分（105）与控制部分（102）电连接以监视负载系统的总电压和电流的状态。 通信接口部（106）与控制部（102），设定部（103），实时模拟部（104）以及监视部（105）连接。
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公开(公告)号：KR1020020057438A
公开(公告)日：2002-07-11
申请号：KR1020010000456
申请日：2001-01-04
Applicant: 한국전기연구원
IPC: H02M3/04
Abstract: PURPOSE: A DC link filling up apparatus and method for dynamic voltage restorer are provided to perform a compensation for an instant voltage drop continuously by maintaining a DC(Direct Current) link voltage of a dynamic voltage restorer. CONSTITUTION: A diode rectifier(10) rectifies an AC(Alternating Current) power into a DC power. A voltage boosting unit(20) which consists of a plurality of DC-DC converter(21,23) in series boosts a voltage of the rectified DC power and supplies a dynamic voltage restorer(30) with the power. A voltage sensor(40,50) detects a voltage level output from the DC-DC converter(21,23). A controlling unit(60) compares the detected voltage level with a reference voltage level, controls the voltage boosting operation of the plurality of DC-DC converter(21,23), and controls an output compensation voltage of the dynamic voltage restorer(30).
Abstract translation: 目的：提供直流链路充电装置和动态电压恢复器的方法，通过维持动态电压恢复器的直流（直流）链路电压，连续地对即时电压降进行补偿。 构成：二极管整流器（10）将AC（交流）功率整流为直流电源。 由串联的多个DC-DC转换器（21,23）组成的升压单元（20）升压整流后的直流电力的电压，并向动力电压恢复器（30）供电。 电压传感器（40,50）检测从DC-DC转换器（21,23）输出的电压电平。 控制单元（60）将检测到的电压电平与参考电压电平进行比较，控制多个DC-DC转换器（21,23）的升压操作，并且控制动态电压恢复器（30）的输出补偿电压， 。
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