仿真和分析
使用分析函数和 Simscape™ 记录变量分析谐波数据、定义谐波数据表和绘制谐波数据图。对半导体中开关事件和导通损耗引起的热损耗进行仿真。执行负载潮流分析并使用结果来初始化 AC 稳态仿真。
Simscape 模块
| Busbar | 潮流分析母排连接器 |
| Load Flow Source | Three-phase voltage source for performing load flow analysis |
函数
ee_calculateFluxPartialDerivatives | Calculate flux partial derivatives for FEM-Parameterized PMSM block |
ee_calculateThdPercent | Compute the total harmonic distortion (THD) percentage |
ee_comtradeDataset | Read and extract values from COMTRADE record |
ee_getBillOfMaterials | Generate report for current model and all subsystems |
ee_getCauerFromFoster | Get equivalent resistance and capacitance vectors for Cauer Thermal Model block from Foster Thermal Model block (自 R2022b 起) |
ee_getEfficiency | Calculate efficiency as function of dissipated power losses |
ee_generateIdealPMSMfluxData | Generate tabulated flux linkage data for ideal PMSM |
generateDCDCConverterROM | Generate reduced-order model of DC-DC power converter system (自 R2025a 起) |
generateMotorDriveROM | Generate reduced-order model of motor drive system (自 R2024a 起) |
generateSemiconductorSwitchROM | Generate reduced-order model of semiconductor switch subsystem (自 R2024b 起) |
generateSemiconductorSubcircuitROM | Generate reduced-order model of SPICE subcircuit (自 R2025a 起) |
ee_getHarmonics | Return harmonic orders, magnitudes, and fundamental frequency |
ee_getNodeDvDtSummary | Calculate maximum absolute values of terminal voltage time derivatives (dv/dt) based on logged simulation data |
ee_getNodeDvDtTimeSeries | Calculate rates-of-change of voltage variables |
ee_getPowerLossSummary | Calculate dissipated power losses and switching losses |
ee_getPowerLossTimeSeries | Calculate dissipated power losses and switching losses, and return time series data |
ee_importDeviceParameters | 对 Hitachi、Infineon 或 Wolfspeed XML 文件中的理想半导体模块进行参数化 (自 R2021b 起) |
ee_plotHarmonics | Plot percentage of fundamental magnitude versus harmonic order |
分析工具
主题
- Examine the Simulation Data Logging Configuration of a Model
Determine if data logging is enabled for your model.
- Choose a Simscape Electrical Function for an Offline Harmonic Analysis
Explore the capabilities of Simscape Electrical™ harmonic analysis functions.
- Perform an Online Harmonic Analysis Using the Simscape Spectrum Analyzer Block
Learn how to analyze harmonic distortion using the Spectrum Analyzer block.
- Perform a Power-Loss Analysis
Calculate power losses for Simscape Electrical semiconductor blocks.
- Perform a Load-Flow Analysis Using Simscape Electrical
Learn how to perform a power-flow, or load-flow, analysis for a three-phase Simscape Electrical network using the Simscape three-phase electrical domain.
- Optimize Block Settings for Simulating with the Partitioning Solver
Avoid simulation errors by configuring models for simulation with the specific solvers by using the
ee_updateSolverfunction. - Phasor-Mode Simulation Using Simscape Components
Configure your model to use frequency-time equation formulation.
精选示例
复合三相整流器
这是分析工作流示例的基础模型。
Harmonic Analysis of a Three-Phase Rectifier
Use functions which analyze Simscape™ logging data to get harmonic magnitudes, calculate total harmonic distortion percentage and plot harmonic magnitudes. The model to which this analysis is applied is of a three-phase rectifier. The functions demonstrated are:
2-Bus Loadflow
A model of a two-bus three-phase power system network. The model uses three instances of the Load Flow Source block from Simscape™ Electrical™, one configured to be the swing bus, one configured to be the PV bus, and one configured to be the PQ load. The PV bus regulates its output to be at a voltage of 1.025 times rated voltage and to deliver 80MW active power to the network. The Swing bus regulates voltage at the other end of the transmission line to be one times rated voltage, and it delivers the requisite power to the network so that overall active and reactive powers balance. The Simscape initialization solver determines the required internal initial voltage amplitudes and phases in both the PV bus and the Swing bus so as to start in steady state.
IEEE 9 母线潮流
此示例展示了一个 9 母线三相电力系统网络的模型。此示例基于 IEEE® 基准测试用例，详细信息可参阅 P. M. Anderson 与 A. A. Fouad 合著的《Power System Control and Stability》（IEEE 出版社，2003 年）。Simscape™ 将其中两台发电机初始化为指定的功率和端电压，而将剩余的平衡母线发电机初始化为仅满足指定的电压。仿真完成后，生成的潮流解会附加到每条母排。其中四行分别对应于标幺电压、相位、有功功率和无功功率。查看母线 1，从注解中可以看到，平衡发电机向网络输送 76.4MW 的有功功率和 27.5MVAr 的无功功率。与原始基准测试用例存在差异的原因在于所使用的输电线模型和变压器配置不同。
IEEE 9 母线系统
此示例展示了如何对 9 母线三相电力系统网络进行建模。此示例基于 IEEE® 基准测试用例。有关详细信息，请参阅 P. M. Anderson 与 A. A. Fouad 合著的《Power System Control and Stability》（IEEE 出版社，2003 年）。
Induction Motor Initialization with Loadflow
Initialize a three-phase induction motor as part of a load flow analysis. When initializing an induction machine that is directly connected to an AC network, in steady state there is one degree of freedom which you can set by any one of shaft torque, shaft power, motor speed, or electrical power.
Synchronous Machine Initialization with Loadflow
Initialize synchronous machine as part of a load flow analysis. When initializing a synchronous machine there are two degrees of freedom which can be set by any two of rotor angle, active power, reactive power and terminal voltage. The pair of variables that are constrained is set by the source type drop-down menu, this having options of Swing bus, PV bus and PQ bus. Here the machine is configured for a swing bus with a 1.02 per-unit voltage and zero degrees phase.
JFET Amplifier and Frequency Response Analysis
An audio amplifier circuit based on an N-channel JFET. The desired operating point is taken to be Vds=5V, Id=2mA and Vgs=-2V. The manufacturer datasheet gives the JFET forward transfer conductance and output conductance values as 3mS and 50uS. These values are used to populate the mask of the N-Channel JFET block.
Power-Loss Analysis of a Three-Phase Rectifier
Perform a power-loss analysis using the ee_getPowerLossSummary function and the power_dissipated variable. The Rectifier contains six Diode blocks. Diodes D1, D2, D4, and D5 each dissipate, on average, 52.19 W over the course of the 0.5 second simulation. Diodes D3 and D6 each dissipate an average of 52.22 W for the same time period because they experience a 340 W transient power-dissipation spike due to DC-load capacitor charging before t = 1e-3 s. For each diode, the average power dissipated when the rectifier is operating in steady-state, t = 0.4 to 0.5 s, is 52.19 W.
Calculate Losses in a Power Converter
Calculate the losses in a power converter using the ee_getPowerLossSummary function and the power_dissipated variable. The power converter contains six Diode blocks. Diodes D1, D2, D4, and D5 each lose, on average, 52.19 W over the course of the 0.5 second simulation. Diodes D3 and D6 each lose an average of 52.22 W for the same time period because they experience a 340 W transient power-dissipation spike due to DC-load capacitor charging before t = 1e-3 s. For each diode, the average power loss when the power converter is operating in steady-state, t = 0.4 to 0.5 s, is 52.19 W.
Mixed AC/DC System Loadflow
Use the Load Flow Analyzer to review the load flow results of a mixed AC/DC system. The model to which this analysis is applied includes an AC load flow source, a three-phase rectifier, and three loads. One of the loads is AC, one is permanently connected on the DC side, and one is switched on the DC side.
