CN103558840B - Build the controller simulation experimental standard interface in kind of RTDS and the method for circuit thereof - Google Patents
Build the controller simulation experimental standard interface in kind of RTDS and the method for circuit thereof Download PDFInfo
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Abstract
A kind ofly build the controller simulation experimental standard interface in kind of RTDS and the method for circuit thereof, RTDS interface is divided into five modules and carries out signal condition by the method, and five modules are respectively alternating voltage conditioning module, small area analysis Signal-regulated kinase, DC voltage turn DC current conditioning module, pulse conditioning module and empty node signal conversion module.Described five modules composition interface circuit, to solve the signaling interface requirement outside RTDS custom interface table input/output bound.Described interface circuit comprises by the MC14504 chip realizing the conversion of 5V fiduciary level; 5V becomes the transformer of 220V; The current transformer of 10V, 0.2A; The DC voltage transmitter of 50V, 25mA; The circuit of relay module composition.The invention solves RTDS interface and control inputs outputs signal unmatched problem, extend the range of application of RTDS simultaneously.The present invention is directed to the convectional signals compatibling problem design interface circuit of RTDS device and control panel, improve the versatility of controller simulation.The present invention is applicable to the controller real-time simulation field of RTDS.
Description
Technical field
The present invention relates to a kind of structure based on the interface of real time data display (RealTimeDigitalSimulator is called for short RTDS) and the method for circuit thereof, belong to electronic information technical field.
Background technology
Along with the develop rapidly of Electrical Power Technology, increasing electrical equipment is controlled by intelligent controller, the performance of controller is the core of electrical equipment performance, and carrying out the accurate test of safety to its each side parameter is the Important Action ensureing device security stable and high effective operation.And electric power network is as the critical facility of substantial connection economical production and people's lives, the test of electrical equipment in electrical network and put into operation also must adequate preparation, careful operation.One of traditional electrical equipment test mode carries out simulation calculation that is theoretical and algorithm with Software-only method; Two is device is directly accessed electrical network to carry out actual motion test.Front a kind of mode Assessment is too desirable, does not relate to the hardware components of device completely, accurately cannot reflect the performance of equipment, only can play reference role.The second way cannot the safety of support equipment and electrical network, not only easily occur test accident, and a lot of special operation condition is difficult to in-site modeling.
RTDS device has the accurate analog ability of electrical network and various state thereof and multiple IO interface, can by equipment primary system and electrical network software simulation, by RTDS interface, software systems are connected with equipment control device, utilize actual samples and control signal to carry out control to test, thus realize carrying out accurate dynamic test in real time comprehensively to electrical equipment controller in laboratory environments, the respective advantage of comprehensive pure software emulation and on-the-spot test, is applicable to equipment research and development and service check thereof very much.But, because the input/output signal of electrical equipment controller is varied, how to build the interface of itself and RTDS device, realize the compatibility of controller and RTDS signal, to ensure test carry out smoothly and confidence level significant.
Though current RTDS possesses multiple IO interface; but its configuration is main to meet the test of protective relaying device; signal input and output standard is comparatively single; versatility is not ideal enough; especially combined-voltage is different according to sensor position with current signal; have different magnitude range and precision, the input/output signal of segment controller may be caused not mate with RTDS interface, have impact on the range of application of RTDS device.
The hardware configuration situation of existing RTDS, its IO interface generally includes:
(1) GTAO mouth (modulating output interface), maximum output voltage is ± 10V, and after coordinating corresponding voltage and current power amplifier, voltage generally can reach 140V, and electric current can reach 60A;
(2) GTDI mouth (digital-quantity input interface), the pulse signal for different electric pressure inputs, and need carry out level compatibility, be applicable to the input of 5V and 24V level pulse by adjustment internal resistance (manufacturer's standard is configured to 330 ohm and 2.2K ohm);
(3) GTFPI mouth (On-off signal output interface): be applicable to the empty node signal accesses such as relay.
Following table is the custom interface table of RTDS.
Summary of the invention
The object of the invention is, in order to solve RTDS interface and control inputs outputs signal unmatched problem, the range of application of expansion RTDS, makes it play a greater role in controller real-time simulation field; The present invention proposes a kind of controller simulation experimental standard interface in kind based on RTDS and circuit thereof.
Realizing technical scheme of the present invention is, the I/O capability of input/output signal needs and existing RTDS interface is commonly used according to controller, RTDS interface is divided into five modules and carries out signal condition respectively by the inventive method, be respectively alternating voltage conditioning module, small area analysis Signal-regulated kinase, DC voltage turn DC current conditioning module, pulse conditioning module and empty node signal conversion module, to solve the signaling interface requirement outside RTDS custom interface table input/output bound.
Alternating voltage conditioning module one end of the present invention connects RTDS alternating voltage modulating output interface by voltage power amplifier, another termination controller 220 volts of Sampling Interfaces; Small area analysis Signal-regulated kinase one end connects RTDS alternating current modulating output interface by current amplification, another termination controller ac small signal Sampling Interface; DC voltage turns DC current conditioning module one end and connects RTDS DC voltage modulating output interface by voltage power amplifier, another termination controller ac small signal Sampling Interface; Pulse conditioning module one termination RTDS digital-quantity input interface, another termination controller pulse signal output end; Empty node signal conversion module one termination RTDS On-off signal output interface, another termination controller switching signal output part.
The controller simulation experimental standard interface board circuit in kind of RTDS of the present invention as shown in Figure 2.Described interface board circuit comprises by the MC14504 chip realizing the conversion of 5V fiduciary level; 5V becomes the transformer of 220V; The current transformer of 10V, 0.2A; The DC voltage transmitter of 50V, 25mA; The circuit of relay module composition.
The corresponding port of MC14504 chip connects the Puled input of RTDS digital-quantity input interface and the pulse output of controller, level conversion switch and the input of 3.3V, 5V, 15V fiduciary level respectively; The transformer that 5V becomes 220V connects RTDS alternating voltage modulating output interface by power amplifier; The current transformer of 10V, 0.2A connects controller small area analysis input interface respectively and connects RTDS alternating current modulating output interface by current amplification; The DC voltage transmitter of 50V, 25mA connects controller DC small signal input interface respectively and connects RTDS DC simulation output interface by voltage power amplifier; Relay module connects controller switching signal respectively and exports and RTDS On-off signal output interface.
The invention has the beneficial effects as follows, the present invention is by after being divided into five modules by RTDS interface, solve RTDS interface and control inputs outputs signal unmatched problem, extend the range of application of RTDS simultaneously, make it play a greater role in controller real-time simulation field.The present invention specially for the convectional signals compatibling problem design interface circuit of RTDS device and control panel, thus improves the signal versatility of the controller simulation in kind based on RTDS.
The present invention is applicable to the controller real-time simulation field of RTDS.
Accompanying drawing explanation
Fig. 1 is interface circuit signal flow diagram;
Fig. 2 is interface board schematic diagram;
Fig. 3 is high-speed level conversion chip MC14504 level conversion schematic diagram;
Picture in picture number: 1 is level conversion selector switch; 2 is MC14504 chips; 3 is input GTDI; 4 is that controller exports pulse.
Embodiment
The specific embodiment of the invention is as follows:
The present embodiment is described the use of several interface module respectively.
One, alternating voltage conditioning module
RTDS device can directly export 0-7.07V ac voltage signal, coordinates common voltage power amplifier easily extensible output area, exports 0-140V ac voltage signal.But in some cases, controller needs line voltage to obtain synchronizing signal with sampling or zero passage mode, needs the input of 220V alternating voltage just can meet the demands.Following method can be adopted to meet the demands by alternating voltage conditioning module:
By RTDS/GTAO(220V:5V) connect voltage power amplifier (5V:50V), then connect step-up transformer (50V:220V) connection control device (220V voltage input interface) afterwards.
Two, small area analysis Signal-regulated kinase
If current sample adopts Hall element in physical device, it may be with the mode access controller of mA level small-signal that its sampling exports, and this type of semaphore request precision is higher, and the linearly degree under normal circumstances within the 0.2A that exports through power amplifier of RTDS is not ideal enough.Following method can be adopted to meet the demands by small area analysis Signal-regulated kinase:
RTDS/GTAO is connect current amplification, after current amplification amplifies, then connects current transformer (10A:0.2A), connect controller small area analysis input interface, wherein the no-load voltage ratio of GTAO and current amplification arranges and can arrange separately according to the size of small area analysis input.
Three, DC voltage turns DC current conditioning module
If direct current sampling adopts Hall element in physical device, it may be mode access controller with DC current small-signal that its sampling exports, and this type of semaphore request precision is higher, and the linearly degree that exports through power amplifier of RTDS is not ideal enough under normal circumstances.Turning DC current conditioning module by DC voltage can adopt following method to meet the demands:
By RTDS/GTAO termination voltage power amplifier, then connect DC voltage transmitter (50V:25mA), after becoming and sending, connect controller DC small signal input interface, wherein the no-load voltage ratio of GTAO and voltage power amplifier arranges and can arrange separately according to the size of DC small signal input.
Four, pulse conditioning module
RTDS device has the digital-quantity input interface GTDI of high-frequency pulse signal, but only compatible 5V and 24V level, and level compatibility need be carried out by adjustment internal resistance, but the output of pulse signal of control panel has plurality of level grade.Pulse signal conditioning module is mainly for 3.3V, 10V, 12V, 15V impulse level that control panel is conventional, and the impulse level exported by controller in kind for outside by interface board conversion meets RTDS interface level.
Concrete grammar is, adopt high-speed level conversion chip MC14504 that 3.3V, 10V, 12V and 15V impulse level is converted to general 5V impulse level, in the GTDI mouth configuration of RTDS, fixedly select the impulse level of 330 ohm to configure resistance to adapt to the input of 5V impulse level.
MC14504 chip is a kind of Special pulse level transferring chip, and the rising and falling time of its output level is 200ns to the maximum, therefore can be used for hypervelocity level conversion.As shown in Figure 3, its supply voltage VCC determines input pulse level, supply voltage VDD determines output impulse level, it can thus be appreciated that by arranging different supply voltage VCC(3.3V, 10V, 12V, 15V) and VDD is set to 5V(GTDI coupling resistance row 0.33K) carry out the input of compatible different controller impulse level, realize the conversion between different supply voltages by toggle switch S in design.
Five, empty node signal conversion module
Physical device is the contactor control signal of 220V as its switching control signal exported of switching capacitance controller, and the break-make being difficult to directly input with the form of empty node the existing software breaker in middle of GTFPI cause for gossip of RTDS controls.Following method can be adopted to meet the demands by the empty node signal conversion module of the present invention:
Controller switching control signal access contactor is driven contactor coil, is connected with GTFPI by empty beginning of contactor.
By can obtain after the invention process RTDS platform carry out be with control imitation signal conversion and I/O capability as shown in the table.
Claims (2)
1. one kind builds the controller simulation experimental standard interface in kind of RTDS and the method for circuit thereof, it is characterized in that, RTDS interface is divided into five modules and carries out signal condition respectively by described method, and five modules are respectively alternating voltage conditioning module, small area analysis Signal-regulated kinase, DC voltage turn DC current conditioning module, pulse conditioning module and empty node signal conversion module;
Described alternating voltage conditioning module one end connects RTDS alternating voltage modulating output interface by voltage power amplifier, another termination controller 220 volts of Sampling Interfaces; Described small area analysis Signal-regulated kinase one end connects RTDS alternating current modulating output interface by current amplification, another termination controller ac small signal Sampling Interface; Described DC voltage turns DC current conditioning module one end and connects RTDS DC voltage modulating output interface by voltage power amplifier, another termination controller ac small signal Sampling Interface; Described pulse conditioning module one termination RTDS digital-quantity input interface, another termination controller pulse signal output end; Described empty node signal conversion module one termination RTDS On-off signal output interface, another termination controller switching signal output part;
Described five modules composition interface circuit, to solve the signaling interface requirement outside RTDS custom interface table input/output bound.
2. the structure controller simulation experimental standard interface in kind of RTDS according to claim 1 and the method for circuit thereof, is characterized in that, described interface circuit comprises by the MC14504 chip realizing the conversion of 5V fiduciary level; 5V becomes the transformer of 220V; The current transformer of 10V, 0.2A; The DC voltage transmitter of 50V, 25mA; The circuit of relay module composition;
The corresponding port of MC14504 chip connects the Puled input of RTDS digital-quantity input interface and the pulse output of controller, level conversion switch and the input of 3.3V, 5V, 15V fiduciary level respectively; The transformer that 5V becomes 220V connects RTDS alternating voltage modulating output interface by power amplifier; The current transformer of 10V, 0.2A connects controller small area analysis input interface respectively and connects RTDS alternating current modulating output interface by current amplification; The DC voltage transmitter of 50V, 25mA connects controller DC small signal input interface respectively and connects RTDS DC simulation output interface by voltage power amplifier; Relay module connects controller switching signal respectively and exports and RTDS On-off signal output interface.
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| CN103926915A (en) * | 2014-04-08 | 2014-07-16 | 国家电网公司 | Three-phase four-wire system APF control-panel debugging method |
| CN105068443B (en) * | 2015-07-03 | 2018-08-14 | 复旦大学 | A kind of design method of safe interface device for HWIL simulation |
| CN106526524A (en) * | 2016-09-30 | 2017-03-22 | 广西电网有限责任公司电力科学研究院 | Electronic transformer transient state test system based on RTDS real-time simulation |
| CN111812575B (en) * | 2020-07-20 | 2023-07-21 | 广东电网有限责任公司电力调度控制中心 | Equivalent simulation method for small-range current transformer |
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| CN201663419U (en) * | 2010-01-15 | 2010-12-01 | 中国南方电网有限责任公司电网技术研究中心 | Closes loop testing system of control protection system for DC thawing device |
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Effective date of registration: 20180724 Address after: 330096 No. 88, min Qiang Road, private science and Technology Park, Nanchang, Jiangxi Co-patentee after: State Grid Corporation of China Patentee after: Power Science Research Institute of Jiangxi Electric Power Co., Ltd. Address before: 100761 West Chang'an Avenue, Xicheng District, Xicheng District, Beijing Co-patentee before: State's net Jiangxi Province Electric power Science Academe Patentee before: State Grid Corporation of China |