阅读说明：本技术 一种航空三级式发电系统电压稳定控制装置 (Voltage stabilization control device of aviation three-level power generation system ) 是由 韩坤 李伟林 王雨峰 董润 徐梓潇 杨敬儒 于 2020-06-05 设计创作，主要内容包括：本发明涉及一种航空三级式发电系统电压稳定控制装置。采用数字式电压稳定装置设计,提升了电压稳定装置的精度和响应速度；利用两块不同类型的数字信号处理芯片,有效的发挥出了浮点算法和整形算法的优势；通过将调压和保护功能分离,有效提升了系统的可靠性和效率。对于DSP调压采用了实际发电系统的数据进行建模,由此就可以使得充分考虑了发电机系统自身干扰和延迟的情况下,获得最快的电压调节速度。而且在控制DSP中集成了故障识别模型,可以识别出故障产生的原因和快速的解决方式。(The invention relates to a voltage stabilization control device of an aviation three-level power generation system. The digital voltage stabilizing device design is adopted, so that the precision and the response speed of the voltage stabilizing device are improved; two different types of digital signal processing chips are utilized, so that the advantages of a floating point algorithm and a shaping algorithm are effectively exerted; by separating the voltage regulation function from the protection function, the reliability and the efficiency of the system are effectively improved. The DSP voltage regulation adopts data of an actual power generation system for modeling, so that the fastest voltage regulation speed can be obtained under the condition that self interference and delay of a generator system are fully considered. And moreover, a fault identification model is integrated in the control DSP, so that the cause of fault generation and a quick solution can be identified.)

1. The utility model provides a tertiary formula power generation system voltage stabilization controlling means of aviation, includes voltage regulation DSP and control DSP, its characterized in that:

the three-level power generation system comprises a permanent magnet machine, an exciter and a main generator;

the voltage regulating DSP acquires the instantaneous value of the three-phase voltage of the main generator, the instantaneous value of the three-phase current of the main generator, the instantaneous value of the exciting current of the exciter and the frequency of the three-phase voltage of the main generator; the voltage regulating DSP calculates the effective value of the current three-phase voltage of the main generator and the frequency of the three-phase voltage of the main generator through the instantaneous value of the three-phase voltage of the main generator, the instantaneous value of the three-phase current of the main generator, the instantaneous value of the exciting current of the exciter and the frequency of the three-phase voltage of the main generator; then the voltage regulating DSP sends a voltage regulating signal to the exciter through a voltage regulating algorithm, so that the three-phase output voltage is stabilized at a working point in a system with frequency change;

controlling the DSP to acquire instantaneous values of three-phase voltage regulating point voltage, three-phase armature current, three-phase feeder current and exciting current, a temperature acquisition signal of a starting generator and an instantaneous value of a permanent magnet motor voltage signal; the control DSP calculates and calculates a zero sequence component, a voltage effective value and a phase sequence of the three-phase power supply system, current effective values of motors at all levels, working temperature and real-time working frequency of the motors during working according to instantaneous values of three-phase voltage regulating point voltage, three-phase armature current, three-phase feeder current and exciting current, a temperature acquisition signal of a starting generator and a voltage signal instantaneous value of a permanent magnet machine; and then controlling the DSP to analyze zero sequence components, voltage effective values and phase sequences of the three-phase power supply system, current effective values of motors at all levels, working temperature and real-time working frequency of the motors during working, analyzing whether the current effective values are in a safety threshold range, and controlling the DSP to control a generator excitation control relay GCR, a generator circuit breaker GCB and a river current bar connection breaker BTB to be switched off if the parameters exceed the safety threshold.

2. The aero three stage power generation system voltage stabilization control device of claim 1, wherein: the device also comprises an analog signal conditioning module, a digital signal conditioning module, an excitation loop module and a power supply module; the analog signal conditioning module is connected with the permanent magnet machine, the exciter and the main generator and acquires instantaneous values of three-phase voltage of the main generator, instantaneous values of three-phase current of the main generator, instantaneous values of exciting current of the exciter, frequency of three-phase voltage of the main generator, voltage of a three-phase voltage regulating point, three-phase armature current, instantaneous values of three-phase feeder current and exciting current, a temperature acquisition signal of the starting generator and an analog signal of the instantaneous value of the voltage signal of the permanent magnet machine;

the analog signal conditioning module is internally provided with voltage conditioning, current conditioning, rectifying and filtering, frequency conditioning and phase sequence detection direct-current component detection functions;

the 3-path three-phase voltage regulation point voltage acquired from the main generator is subjected to voltage regulation and rectification filtering by the analog signal conditioning unit, then is subjected to AD conversion, and then is sent to the voltage regulation DSP to serve as the instantaneous value of the three-phase voltage of the main generator; 3 paths of three-phase armature current collected from the main generator and 1 path of exciting current collected from the exciter are subjected to current conditioning by the analog signal conditioning unit, subjected to AD conversion and then sent to the voltage regulating DSP to serve as the instantaneous value of the three-phase current of the main generator and the instantaneous value of the exciting current of the exciter; the 3-path three-phase voltage regulation point voltage acquired from the main generator is subjected to frequency regulation by the analog signal conditioning unit, is captured by the eCAP and is transmitted to the voltage regulation DSP to serve as the frequency of the three-phase voltage of the main generator;

the output end of the voltage regulating DSP is connected with an excitation loop, the excitation loop sends a voltage regulating signal, and the excitation loop controls the current of the exciter according to the voltage regulating signal to realize the voltage regulating control of the main generator.

3. The aero three stage power generation system voltage stabilization control device of claim 2, wherein: the 3-path three-phase voltage regulating point voltage acquired from the main generator is subjected to voltage regulation, direct-current component detection and phase sequence detection by the analog signal conditioning unit, is subjected to AD conversion and is then sent to the control DSP to obtain the three-phase voltage regulating point voltage;

the collected 3 paths of armature currents, 1 path of exciting current and 3 paths of three-phase feeder currents are subjected to current conditioning by the analog signal conditioning unit, are subjected to AD conversion and are sent to the control DSP as three-phase armature currents, instantaneous values of exciting currents and three-phase feeder currents;

the output of the control DSP is connected with a digital signal conditioning module, and the digital signal conditioning module controls the on-off of a generator excitation control relay GCR, a generator circuit breaker GCB and a river current bar connection breaker BTB.

4. The aero three stage power generation system voltage stabilization control device of claim 2, wherein: the power module supplies power through a permanent magnet machine of the three-pole type aviation generator or is supplied with power from the outside of the system.

5. The aero three stage power generation system voltage stabilization control device of claim 1, wherein: the voltage regulating DSP selects an F28335 floating point digital signal processing chip; the control DSP selects an F2812 fixed-point digital signal processing chip.

6. A method for achieving voltage stabilization control of an aeronautical three-stage power generation system using the device of any one of claims 1 to 5, characterized in that: the control method comprises two parts of voltage regulation control and protection control;

and (3) voltage regulation control:

the voltage regulating DSP obtains the instantaneous value U of the three-phase voltage of the main generator₁Instantaneous value I of three-phase current of main generator₁Instantaneous value I of exciting current of exciter₂Frequency f of three-phase voltage of main generator₁Target voltage U₂(ii) a A voltage regulating DSP is internally provided with a voltage regulating model, and the voltage regulating DSP regulates the instantaneous value U of the three-phase voltage of the main generator₁Instantaneous value I of three-phase current of main generator₁Instantaneous value I of exciting current of exciter₂Frequency f of three-phase voltage of main generator₁Target voltage U₂Inputting a voltage regulating model to obtain required voltage regulating change current dI, then sending the dI to an excitation loop, and controlling the current of the excitation coil by the excitation loop to enable I₂’＝I₂+dI；

The method for establishing the voltage regulation model comprises the steps of presetting an instantaneous value U of three-phase voltage of a group of motors₁Instantaneous value I of three-phase current of main generator₁Instantaneous value I of exciting current of exciter₂Three phases with main generatorFrequency f of the voltage₁Target voltage U₂Loaded in the actual power generation system, then given a dI, the slave U is calculated₁Change to U₂Time dt of (d);

then, a plurality of groups of different dI are given to obtain corresponding slave U₁Change to U₂Time dt of (d); then a group of U is replaced₁、U₂、I₁、I₂、f₁Then repeatedly giving different dI and calculating the slave U₁Change to U₂Time dt of (d);

repeating multiple groups until U₁、U₂、I₁、I₂、f₁Covering the required range to obtain a multidimensional data matrix, i.e. each group U₁、U₂、I₁、I₂、f₁And dI both correspond to a dt, and then U is added₁、U₂、I₁、I₂、f₁Under the same condition, the dI with the minimum dt is stored as the output of the pressure regulating model;

protection control:

controlling the DSP to obtain instantaneous values of three-phase voltage regulating point voltage, three-phase armature current, three-phase feeder current and exciting current, a temperature acquisition signal of a starting generator and an instantaneous value of a permanent magnet motor voltage signal, and then inputting the instantaneous values into a fault judgment model to obtain a fault reason code;

the method for establishing the fault judgment model comprises the steps of collecting instantaneous values of three-phase voltage regulating point voltage, three-phase armature current, three-phase feeder line current and exciting current, temperature acquisition signals of a starting generator and instantaneous value data of a permanent magnet motor voltage signal under different faults, and coding the faults; then, the instantaneous values of the three-phase voltage regulating point voltage, the three-phase armature current, the three-phase feeder line current and the exciting current, the temperature acquisition signal of the starting generator and the sequential value of the voltage signal of the permanent magnet machine are used as input, and the fault code is used as output to establish a neural network model, so that the corresponding fault code with the highest relevance can be obtained after the instantaneous values of the three-phase voltage regulating point voltage, the three-phase armature current, the three-phase feeder line current and the exciting current, the temperature acquisition signal of the starting generator and the instantaneous value of the voltage signal of the permanent magnet machine are input, and the fault code can be obtained simultaneously under the condition of circuit breaking protection; and the fault codes are calculated by the control DSP and then are sent to the display device for display.

Technical Field

The invention belongs to the field of electrical equipment and electrical engineering, and particularly relates to a voltage stability control device of a high-voltage variable-frequency alternating-current three-stage power generation system applied to the field of civil aviation.

Background

The voltage stabilization Control device, also called as a Generator Control Unit (GCU), is a main controller of the onboard power system. At present, a digital voltage stabilization control device adopted by an airplane power supply system in China is mainly a semi-digital voltage stabilization control device. The semi-digital GCU takes a single chip microcomputer as a core and integrates a power supply system control function, a power supply system real-time protection function, a GCU self-detection function, a GCU fault diagnosis isolation function, an upper computer communication function and the like. Compared with a digital signal processing chip, the performance of the voltage stabilization control device taking the single chip microcomputer as a core is limited by the function of the single chip microcomputer chip, firstly, the single chip microcomputer is in a disadvantage in the aspects of response speed, adjustable resources, precision and the like, and secondly, the voltage stabilization function of the half-digital GCU is realized by means of an analog circuit when the half-digital GCU is applied to a voltage regulation environment with higher dynamic characteristics; finally, the semi-digital GCU needs to realize the voltage regulation function by means of an external analog circuit, so that the semi-digital GCU has disadvantages in maintainability, expansibility and reliability, and has the disadvantages of low automation degree, low response speed and the like. This makes the semi-digital GCU no longer in line with the development of high precision, high speed and high versatility of voltage stabilization control device design.

In order to solve the problems of the prior art, a novel all-digital GCU structure with a high-performance Digital Signal Processor (DSP) as a core is proposed. The structure fully embodies the characteristics of high speed, high precision and high compatibility of the DSP, and can utilize the strong digital signal processing capability to complete the operation of a high-precision complex algorithm at high speed.

DSPs can be classified into floating-point type DSPs and fixed-point type DSPs according to the type of variables they operate on. The fixed-point DSP has high operation speed, but can only operate integer variables, and has lower precision; the floating-point DSP can operate floating-point numbers, has strong processing capacity on complex floating-point algorithms, and is high in precision. Based on the characteristics of above chip, this patent has proposed the voltage stabilization control device of a novel two DSP structures. The structure has the advantages that the advantages of different types of DSPs can be fully exerted, the fixed-point type DSP has high response speed, and the structure is applied to scenes with functions of protection, communication and the like, which have low precision requirements but have high requirements on response speed; while floating-point DSPs focus on the voltage stabilization function by using complex and precise floating-point algorithms.

With the gradual popularization of the variable frequency power supply system, the traditional analog GCU and the semi-digital GCU cannot meet the voltage regulation and protection requirements of the variable frequency power supply system. Therefore, it is necessary to develop a digital voltage stabilizer with high precision and fast response.

"design OF aircraft generator controller based on double DSP and FPGA", wu xianhua, etc. "computer measurement and control" 2009, 1123-1125 discloses an aircraft generator controller based on double DSP and FPGA, the generator controller adopts fixed point TMS320F2812 and floating point TMS32OF28335 to construct a double DSP processor structure, and combines with FPGA to realize the independent work OF control protection and voltage regulation function, but the design only gives the design idea, there is no specific method for giving the monitored parameters and voltage regulation, and the present general voltage regulation control method is numerical analysis type, that is, the parameters to be controlled are obtained by numerical operation, and the intelligence needs to be improved.

Disclosure of Invention

Aiming at the above, in order to solve the above problems, the voltage stabilization control device for the aviation three-stage power generation system is provided, and comprises a voltage regulation DSP and a control DSP; the three-level power generation system comprises a permanent magnet machine, an exciter and a main generator;

the invention adopts two digital signal processing chips to respectively execute the voltage stabilizing function and the control protection function. The two digital signal processing chips which form the system are called a voltage regulating DSP and a control DSP respectively, and the voltage regulating DSP must be a floating point type DSP capable of processing floating point numbers.

The voltage regulating DSP acquires the instantaneous value of the three-phase voltage of the main generator, the instantaneous value of the three-phase current of the main generator, the instantaneous value of the exciting current of the exciter and the frequency of the three-phase voltage of the main generator; the voltage regulating DSP calculates the effective value of the current three-phase voltage of the main generator and the frequency of the three-phase voltage of the main generator through the instantaneous value of the three-phase voltage of the main generator, the instantaneous value of the three-phase current of the main generator, the instantaneous value of the exciting current of the exciter and the frequency of the three-phase voltage of the main generator; then the voltage regulating DSP sends a voltage regulating signal to the exciter through a voltage regulating algorithm, so that the three-phase output voltage is stabilized at a working point in a system with frequency change;

controlling the DSP to acquire instantaneous values of three-phase voltage regulating point voltage, three-phase armature current, three-phase feeder current and exciting current, a temperature acquisition signal of a starting generator and an instantaneous value of a permanent magnet motor voltage signal; the control DSP calculates and calculates a zero sequence component, a voltage effective value and a phase sequence of the three-phase power supply system, current effective values of motors at all levels, working temperature and real-time working frequency of the motors during working according to instantaneous values of three-phase voltage regulating point voltage, three-phase armature current, three-phase feeder current and exciting current, a temperature acquisition signal of a starting generator and a voltage signal instantaneous value of a permanent magnet machine; and then controlling the DSP to analyze zero sequence components, voltage effective values and phase sequences of the three-phase power supply system, current effective values of motors at all levels, working temperature and real-time working frequency of the motors during working, analyzing whether the current effective values are in a safety threshold range, and controlling the DSP to control a generator excitation control relay GCR, a generator circuit breaker GCB and a river current bar connection breaker BTB to be switched off if the parameters exceed the safety threshold.

The device also comprises an analog signal conditioning module, a digital signal conditioning module, an excitation loop module and a power supply module;

the analog signal conditioning module is connected with the permanent magnet machine, the exciter and the main generator and acquires instantaneous values of three-phase voltage of the main generator, instantaneous values of three-phase current of the main generator, instantaneous values of exciting current of the exciter, frequency of three-phase voltage of the main generator, voltage of a three-phase voltage regulating point, three-phase armature current, instantaneous values of three-phase feeder current and exciting current, a temperature acquisition signal of the starting generator and an analog signal of the instantaneous value of the voltage signal of the permanent magnet machine;

the analog signal conditioning module is internally provided with voltage conditioning, current conditioning, rectifying and filtering, frequency conditioning and phase sequence detection direct-current component detection functions;

the 3-path three-phase voltage regulation point voltage acquired from the main generator is subjected to voltage regulation and rectification filtering by the analog signal conditioning unit, then is subjected to AD conversion, and then is sent to the voltage regulation DSP to serve as the instantaneous value of the three-phase voltage of the main generator; 3 paths of three-phase armature current collected from the main generator and 1 path of exciting current collected from the exciter are subjected to current conditioning by the analog signal conditioning unit, subjected to AD conversion and then sent to the voltage regulating DSP to serve as the instantaneous value of the three-phase current of the main generator and the instantaneous value of the exciting current of the exciter; the 3-path three-phase voltage regulation point voltage acquired from the main generator is subjected to frequency regulation by the analog signal conditioning unit, is captured by the eCAP and is transmitted to the voltage regulation DSP to serve as the frequency of the three-phase voltage of the main generator;

the output end of the voltage regulating DSP is connected with an excitation loop, the excitation loop sends a voltage regulating signal, and the excitation loop controls the current of the exciter according to the voltage regulating signal to realize the voltage regulating control of the main generator.

The 3-path three-phase voltage regulating point voltage acquired from the main generator is subjected to voltage regulation, direct-current component detection and phase sequence detection by the analog signal conditioning unit, is subjected to AD conversion and is then sent to the control DSP to obtain the three-phase voltage regulating point voltage;

the collected 3 paths of armature currents, 1 path of exciting current and 3 paths of three-phase feeder currents are subjected to current conditioning by the analog signal conditioning unit, are subjected to AD conversion and are sent to the control DSP as three-phase armature currents, instantaneous values of exciting currents and three-phase feeder currents;

the output of the control DSP is connected with a digital signal conditioning module, and the digital signal conditioning module controls the on-off of a generator excitation control relay GCR, a generator circuit breaker GCB and a river current bar connection breaker BTB.

The power module supplies power through a permanent magnet machine of the three-pole type aviation generator or is supplied with power from the outside of the system.

The voltage regulating DSP selects F28335 floating point digital signal processing chip. The control DSP selects an F2812 fixed-point digital signal processing chip.

The control method of the device comprises two parts of voltage regulation control and protection control.

And (3) voltage regulation control:

the voltage regulating DSP obtains the instantaneous value U of the three-phase voltage of the main generator₁Instantaneous value I of three-phase current of main generator₁Instantaneous value I of exciting current of exciter₂Frequency f of three-phase voltage of main generator₁Target voltage U₂(ii) a A voltage regulating DSP is internally provided with a voltage regulating model, and the voltage regulating DSP regulates the instantaneous value U of the three-phase voltage of the main generator₁Instantaneous value I of three-phase current of main generator₁Instantaneous value I of exciting current of exciter₂Frequency f of three-phase voltage of main generator₁Target voltage U₂Inputting a voltage regulating model to obtain required voltage regulating change current dI, then sending the dI to an excitation loop, and controlling the current of the excitation coil by the excitation loop to enable I₂’＝I₂+dI。

The method for establishing the voltage regulation model comprises the steps of presetting an instantaneous value U of three-phase voltage of a group of motors₁Instantaneous value I of three-phase current of main generator₁Instantaneous value I of exciting current of exciter₂Frequency f of three-phase voltage of main generator₁Target voltage U₂Loaded in the actual power generation system, then given a dI, the slave U is calculated₁Change to U₂Time dt of (d);

then, a plurality of groups of different dI are given to obtain corresponding slave U₁Change to U₂Time dt of (c). Then a group of U is replaced₁、U₂、 I₁、I₂、f₁Then repeatedly giving different dI and calculating the slave U₁Change to U₂Time dt of (d);

repeating multiple groups until U₁、U₂、I₁、I₂、f₁Covering the required range to obtain a multidimensional data matrix, i.e. each group U₁、U₂、I₁、I₂、f₁And dI both correspond to a dt, and then U is added₁、U₂、I₁、I₂、f₁The dI with the lowest dt in the same case is saved as the output of the voltage regulation model.

Protection control:

and the control DSP obtains instantaneous values of three-phase voltage regulating point voltage, three-phase armature current, three-phase feeder current and exciting current, a temperature acquisition signal of the starting generator and an instantaneous value of a permanent magnet motor voltage signal, and then inputs the instantaneous values into a fault judgment model to obtain a fault reason code.

The method for establishing the fault judgment model comprises the steps of collecting instantaneous values of three-phase voltage regulating point voltage, three-phase armature current, three-phase feeder line current and exciting current, temperature acquisition signals of a starting generator and instantaneous value data of a permanent magnet motor voltage signal under different faults, and coding the faults; then, the instantaneous values of the three-phase voltage regulating point voltage, the three-phase armature current, the three-phase feeder line current and the exciting current, the temperature acquisition signal of the starting generator and the sequential value of the voltage signal of the permanent magnet machine are used as input, and the fault code is used as output to establish a neural network model, so that the corresponding fault code with the highest correlation can be obtained after the instantaneous values of the three-phase voltage regulating point voltage, the three-phase armature current, the three-phase feeder line current and the exciting current, the temperature acquisition signal of the starting generator and the instantaneous value of the voltage signal of the permanent magnet machine are input, and the fault code can be obtained simultaneously under the condition of circuit breaking protection. And the fault codes are calculated by the control DSP and then are sent to the display device for display.

The voltage regulating DSP calculates system parameters related to the voltage regulating function by receiving analog signals of the starting generator during working, and realizes stable control of the voltage and the current of the airborne power supply system through the parameters. The signals collected include: instantaneous values of three-phase voltages, instantaneous values of three-phase currents, instantaneous values of exciter exciting currents, frequencies of the three-phase voltages and the like. The current three-phase voltage effective value and three-phase voltage frequency of the system can be calculated through the acquired signals, and then the three-phase output voltage can be controlled to be stabilized at a working point in the frequency-changing system through a floating point algorithm of the voltage-regulating DSP.

And the control DSP calculates system parameters related to protection and communication functions by receiving analog signals when the starter generator works, and realizes the functions of monitoring the normal work of the voltage stabilization control device, the starter generator and the power transmission line through the parameters. The collected signals comprise instantaneous values of three-phase voltage regulating point voltage, three-phase armature current, three-phase feeder current and exciting current, temperature collecting signals of the starting generator and instantaneous values of permanent magnet motor voltage signals. After the signals are collected, system parameters such as zero sequence components, effective voltage values and phase sequences of the three-phase power supply system, current effective values of motors at all levels, working temperature and real-time working frequency of the motors during working and the like can be calculated through a DSP built-in algorithm. The system parameters are key parameters for judging whether a fault exists in the power supply system by the DSP, and once part of the system parameters exceed the normal working range, the DSP is controlled to control a plurality of connectors in the power generation system to stop power generation through a built-in algorithm, so that the functions of protecting the power system, stabilizing a control device and starting a generator are realized. Meanwhile, the DSP is controlled to transmit the working state of the generator to the upper computer, so that the working states of the power generation system and the voltage stabilizing device can be artificially monitored in real time.

The digital voltage stabilizing device design is adopted, so that the precision and the response speed of the voltage stabilizing device are improved; two different types of digital signal processing chips are utilized, so that the advantages of a floating point algorithm and a shaping algorithm are effectively exerted; by separating the voltage regulation function from the protection function, the reliability and the efficiency of the system are effectively improved. The DSP voltage regulation adopts data of an actual power generation system for modeling, so that the fastest voltage regulation speed can be obtained under the condition that self interference and delay of a generator system are fully considered. And moreover, a fault identification model is integrated in the control DSP, so that the cause of fault generation and a quick solution can be identified.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosed subject matter, are incorporated in and constitute a part of this specification. The drawings illustrate the implementations of the disclosed subject matter and, together with the detailed description, serve to explain the principles of implementations of the disclosed subject matter. No attempt is made to show structural details of the disclosed subject matter in more detail than is necessary for a fundamental understanding of the disclosed subject matter and various modes of practicing the same.

FIG. 1 is a schematic diagram of the overall structure of a voltage stabilizing device of an aviation three-pole generator;

FIG. 2 is a schematic diagram of a voltage regulation DSP functional structure;

FIG. 3 is a diagram illustrating the functional structure of the control DSP.

Detailed Description

The advantages, features and methods of accomplishing the same will become apparent from the drawings and the detailed description that follows.