JP2016158339A - Property stabilization device for dc power supply system - Google Patents

Property stabilization device for dc power supply system Download PDF

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JP2016158339A
JP2016158339A JP2015033454A JP2015033454A JP2016158339A JP 2016158339 A JP2016158339 A JP 2016158339A JP 2015033454 A JP2015033454 A JP 2015033454A JP 2015033454 A JP2015033454 A JP 2015033454A JP 2016158339 A JP2016158339 A JP 2016158339A
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capacity
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JP6536073B2 (en
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啓 町田
Hiroshi Machida
啓 町田
野村　昌克
Masakatsu Nomura
昌克 野村
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Meidensha Corp
Meidensha Electric Manufacturing Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To solve the problem that, in a power system where different kinds of multiple power sources and a DC voltage control device are connected to a DC bus line, when a capacity of connected equipment is changed, it becomes necessary to adjust a voltage control system parameter of the DC voltage control device again.SOLUTION: A DC system property adjustment device is connected. When changing a configuration of a power supply system connected to a DC bus line, a virtual current command Iis outputted from the DC system property adjustment device, and the virtual current command Iand a current Ioutputted from a DC voltage control part of the DC voltage control device are added and defined as a voltage control command of the bus line. In the DC system property adjustment device, a virtual capacity command and a capacity estimation current are outputted by a bus line electrostatic capacity estimation part.SELECTED DRAWING: Figure 1

Description

本発明は、直流電源系統の特性安定化装置に係わり、特に仮想コンデンサの静電容量を可変することで直流電源系統の特性の安定化を図った装置に関するものである。   The present invention relates to a DC power supply system characteristic stabilization apparatus, and more particularly to an apparatus that stabilizes the DC power supply system characteristics by changing the capacitance of a virtual capacitor.

図６は直流電源系統を示したもので、直流のバスライン１に太陽光発電装置２，出力側にＡＣ／ＤＣ変換器を有する風力発電装置３など異なる複数の分散電源および電力貯蔵装置を有する直流電圧制御装置４を接続し、バスライン１の電圧を直流電圧制御装置４により所定の電圧値に制御する。順・逆変換可能に構成された電力変換装置５は、バスライン１の直流電圧を交流電圧に変換して交流の負荷６へ交流電力を供給する。   FIG. 6 shows a DC power supply system, which has a plurality of different distributed power sources and power storage devices such as a solar power generator 2 on a DC bus line 1 and a wind power generator 3 having an AC / DC converter on the output side. A DC voltage control device 4 is connected, and the voltage of the bus line 1 is controlled to a predetermined voltage value by the DC voltage control device 4. The power conversion device 5 configured to be capable of forward / reverse conversion converts the DC voltage of the bus line 1 into an AC voltage and supplies AC power to the AC load 6.

直流電圧制御装置４はその拡大図で示すように、例えば特許文献１に記載されたもので、大略で直列に接続された２個のスイッチング素子Ｓ１，Ｓ２からなるチョッパ回路ｃｈ、リアクトルＬ、電気二重層キャパシタＥＤＬＣおよびバッテリーＢなどを備え、チョッパ回路Ｃhをオン・オフ制御することで充放電制御をし、バスライン１の直流電圧を所定値に維持している。 As shown in the enlarged view, the DC voltage control device 4 is described in, for example, Patent Document 1, and is roughly a chopper circuit ch, a reactor L, an electric circuit composed of two switching elements S1 and S2 connected in series. two and the like layer capacitor EDLC and the battery B, and the chopper circuit C h a charge and discharge control by on-off control, maintains the DC voltage of the bus line 1 to a predetermined value.

特許第５１６９７６５Patent No. 5169765

バスライン１に直流電圧制御装置４を接続して直流電圧を所定値に制御する電力システムにおいては、安定性・応答性・誤差を考慮して、電力システムに合わせて制御系の調整が行われる。しかしなから、図６で示すような電力システムにおいては、バスライン１に接続する装置の増減や容量変更の可能性が高く、接続装置の増減によりインピーダンス、特に静電容量が増減する。これを放置すると直流電圧制御装置４の制御特性が変化して直流電圧の制御劣化につながることから、接続装置の増減の都度、直流電圧制御装置４の制御パラメータの再調整が必要となっている。   In a power system in which the DC voltage control device 4 is connected to the bus line 1 to control the DC voltage to a predetermined value, the control system is adjusted according to the power system in consideration of stability, responsiveness, and error. . However, in the power system as shown in FIG. 6, there is a high possibility that the number of devices connected to the bus line 1 is increased or decreased, and the capacity is changed. If this is left unattended, the control characteristics of the DC voltage control device 4 will change, leading to control deterioration of the DC voltage. Therefore, it is necessary to readjust the control parameters of the DC voltage control device 4 whenever the number of connected devices increases or decreases. .

本発明が目的とするところは、接続装置の増減が生じても容易に静電容量の設定を可能にした直流電源系統の特性安定化装置を提供することにある。   An object of the present invention is to provide a characteristic stabilizing device for a DC power supply system that can easily set the capacitance even when the number of connection devices increases or decreases.

本発明は、直流のバスラインに、異なった種類の複数の直流電源と、蓄電装置を有する直流電圧制御装置を接続した電力システムにおいて、
前記直流のバスラインに直流系統特性調整装置を接続し、
前記直流のバスラインに接続された電源系統の構成変更時に、前記直流系統特性調整装置から仮想電流指令ＩCRを出力し、前記直流電圧制御装置の直流電圧制御部が出力した電流ＩVRに加算して前記バスラインの電圧制御指令としたことを特徴としたものである。 The present invention relates to a power system in which a DC bus line is connected to a plurality of different types of DC power supplies and a DC voltage control device having a power storage device.
Connect a DC system characteristic adjusting device to the DC bus line,
When the configuration of the power supply system connected to the DC bus line is changed, a virtual current command ICR is output from the DC system characteristic adjusting device and added to the current IVR output by the DC voltage control unit of the DC voltage control device Thus, the voltage control command for the bus line is used.

本発明の直流系統特性調整装置は、直流電流検出ＩLと直流電圧検出ＶDCを入力してバスライン推定容量ＣEを推定出力すると共に、所定の周波数を有する容量推定電流ＩESTを発生するバスライン静電容量推定部と、
予め設定された設定静電容量ＣRと前記バスライン推定容量ＣEの差分と、直流電圧検出ＶDC、および前記容量推定電流ＩESTから前記仮想電流指令ＩCRを出力する仮想容量制御部を備えたことを特徴としたものである。 The DC system characteristic adjusting apparatus according to the present invention inputs a DC current detection IL and a DC voltage detection VDC , estimates and outputs a bus line estimated capacity CE , and generates a capacity estimated current IEST having a predetermined frequency. A bus line capacitance estimation unit;
A virtual capacity control unit that outputs the virtual current command I CR from a difference between a preset set capacitance C R and the bus line estimated capacity C E , a DC voltage detection V DC , and the capacity estimated current I EST ; It is characterized by having provided.

本発明の直流系統特性調整装置は、直流電流検出ＩLを直流電圧検出ＶDCの微分値ｄＶDCで除算する除算部と、
推定実施指令のオン時に前記除算部による除算値を入力し、推定実施指令のオフ時に除算値をホールドしてバスライン推定容量ＣEとして出力するホールド回路と、
前記推定実施指令のオン時に、方形波状で正・負同一電流値で所定の周波数を有する容量推定電流ＩESTを発生するバスライン容量推定用電流指令発生部と、
前記バスライン推定容量ＣEと設定静電容量ＣRとの差分で生成される仮想容量指令ＣVRに、前記直流電圧検出ＶDCの微分値を乗算して電流推定ＩCVを生成する仮想容量制御部と、
前記仮想容量制御部により生成された電流推定ＩCVと前記容量推定電流ＩESTを加算して仮想電流指令ＩCRとして前記直流電圧制御装置に出力するよう構成したことを特徴としたものである。 DC system characteristic adjustment apparatus of the present invention includes: a division unit for dividing the DC current detection I L in the differential value dV DC of the DC voltage detection V DC,
A hold circuit that inputs a division value by the division unit when the estimation execution command is on, holds the division value when the estimation execution command is off, and outputs it as a bus line estimated capacity CE ;
When the estimation execution command is turned on, a bus line capacity estimation current command generation unit that generates a capacity estimation current I EST having a predetermined frequency with the same positive / negative current value as a square wave,
A virtual capacitance that generates a current estimate I CV by multiplying a virtual capacitance command C VR generated by the difference between the bus line estimated capacitance CE and the set capacitance C R by the differential value of the DC voltage detection V DC. A control unit;
The current estimation I CV generated by the virtual capacity control unit and the capacity estimation current I EST are added together and output to the DC voltage control device as a virtual current command I CR .

本発明の容量推定電流ＩESTは、方形波状の正，負側ともに同じ電流値で所定の周波数であることを特徴としたものである。 The capacity estimation current I EST of the present invention is characterized in that both the positive and negative sides of the square wave have the same current value and a predetermined frequency.

本発明の直流電圧制御装置は、直列接続された２個のスイッチング素子からなるチョッパ回路と、
前記チョッパ回路に接続された電気二重層キャパシタと、
前記チョッパ回路の橋絡点と前記バスラインの正側間に接続されたリアクトルと、
前記直流電圧制御部が出力した電流ＩVRと前記仮想電流指令ＩCRとの加算値から電流検出ＩLを減じて電流指令ＩLRを生成し、生成された電流指令ＩLRを入力して前記スイッチング素子のゲート信号を算出する電流制御部を備えたことを特徴としたものである。 A DC voltage control device of the present invention includes a chopper circuit composed of two switching elements connected in series,
An electric double layer capacitor connected to the chopper circuit;
A reactor connected between the bridge point of the chopper circuit and the positive side of the bus line;
The current command I LR is generated by subtracting the current detection I L from the added value of the current I VR output from the DC voltage controller and the virtual current command I CR, and the generated current command I LR is input to A current control unit for calculating a gate signal of the switching element is provided.

以上のとおり、本発明によれば、直流のバスラインに接続される機器系統の構成が変更されても、直流電圧制御部の電圧制御系パラメータ変更を必要としないものである。また、直流のバスラインに接続される静電容量を設定した容量に合わすことができるので、適当な容量を仮定して直流電圧制御部の電圧制御系を設計することが出来る。さらに、仮想設定を行う仮想容量の推定容量が負になることから、設定する仮想容量は実際の容量よりも小さい値にすることが可能となり、直流のバスラインに値の大きな容量が並列接続されていても、全体の容量を設定値にすることが可能となるものである。   As described above, according to the present invention, even if the configuration of the equipment system connected to the DC bus line is changed, it is not necessary to change the voltage control system parameter of the DC voltage control unit. In addition, since the capacitance connected to the DC bus line can be set to the set capacitance, the voltage control system of the DC voltage controller can be designed assuming an appropriate capacitance. Furthermore, since the estimated capacity of the virtual capacity for performing the virtual setting becomes negative, the virtual capacity to be set can be set to a value smaller than the actual capacity, and a large value capacity is connected in parallel to the DC bus line. Even in this case, the entire capacity can be set to the set value.

本発明の実施形態を示す構成図。The block diagram which shows embodiment of this invention. 本発明の直流系統特性調整装置の構成図。The block diagram of the direct-current system characteristic adjustment apparatus of this invention. 直流電圧系統の説明図。Explanatory drawing of a DC voltage system. 静電容量推定部の構成図。The block diagram of an electrostatic capacitance estimation part. 仮想容量制御部の構成図。The block diagram of a virtual capacity control part. 従来の直流系統の構成図。The block diagram of the conventional DC system.

図１は本発明による構成図を示したもので、図６と同一部分に同一符号を付している。すなわち、本発明は直流のバスライン１に直流系統特性調整装置１０を設けたもので、この直流系統特性調整装置１０は図２のように構成されている。図２において、１１は直流のバスライン１の静電容量推定部で、直流系統の接続装置の変更時に静電容量の推定を行う。静電容量推定部１１にはバスラインの直流電圧検出ＶDCと直流電流検出ＩLが入力されてバスライン推定容量ＣEと容量推定電流ＩESTが生成され出力される。１２は減算部で、予め設定されたバスラインの設定静電容量ＣRとバスライン推定容量ＣEとの差分が求められ、その差分が仮想容量指令ＣVRとして仮想容量制御部１３に入力される。 FIG. 1 shows a configuration diagram according to the present invention, and the same reference numerals are given to the same parts as those in FIG. That is, in the present invention, a DC system characteristic adjusting device 10 is provided on the DC bus line 1, and this DC system characteristic adjusting device 10 is configured as shown in FIG. In FIG. 2, 11 is a capacitance estimation unit of the DC bus line 1, and estimates the capacitance when the connection device of the DC system is changed. The capacitance estimating unit 11 DC current detection I L and the detected DC voltage V DC of the bus line is input bus line estimation capacitance C E and the capacitance estimated current I EST is generated and output. A subtraction unit 12 obtains a difference between a preset bus line capacitance CR and a bus line estimation capacitance CE, and the difference is input to the virtual capacitance control unit 13 as a virtual capacitance command CVR. The

仮想容量制御部１３では、入力されたバスラインの直流電圧検出ＶDCと仮想容量指令ＣVRからバスラインの仮想容量における電流推定ＩCVを生成して加算部１４に出力する。加算部１４では電流推定ＩCVと容量推定電流ＩESTを加算して仮想電流指令ＩCRとする。この仮想電流指令ＩCRは直流電圧制御装置４の加減算部４３に出力される。 The virtual capacity control unit 13 generates a current estimation I CV in the virtual capacity of the bus line from the input bus line DC voltage detection V DC and the virtual capacity command C VR and outputs the current estimation I CV to the addition unit 14. The adding unit 14 adds the current estimation I CV and the capacity estimation current I EST to obtain a virtual current command I CR . The virtual current command I CR is output to the addition / subtraction unit 43 of the DC voltage control device 4.

直流電圧制御装置４は、電気二重層キャパシタＥＤＬＣ、チョッパ回路Ｃhよるなる直流電圧調整手段とバッテリーからなる蓄電部を有しており、減算部４１において直流電圧指令ＶCRと電気二重層キャパシタＥＤＬＣの電圧検出ＶCとの差分を求めて直流電圧制御部４２に入力する。直流電圧制御部４２は入力された差分に基づいて電気二重層キャパシタＥＤＬＣの電圧を制御するための電流ＩVRを生成し、加減算部４３に出力される。 DC voltage control unit 4, an electric double layer capacitor EDLC, has a power storage unit comprising a DC voltage regulator and a battery made by a chopper circuit C h, the DC voltage command V CR and the electric double layer capacitor EDLC in the subtraction portion 41 A difference from the voltage detection V C is obtained and input to the DC voltage control unit 42. The DC voltage controller 42 generates a current I VR for controlling the voltage of the electric double layer capacitor EDLC based on the input difference, and outputs the current I VR to the adder / subtractor 43.

加減算部４３では、生成それた電流ＩVRと仮想電流指令ＩCRとの加算値から直流電流検出ＩLを減算して電流指令ＩLRを生成して電流制御部４４に入力する。電流制御部４４は、直流電流が電流指令ＩLRとなるようゲート信号ＳG1，ＳG2を発生してスイッチング素子Ｓ１，Ｓ２を制御する。 The subtraction unit 43, is input to the current controller 44 generates a product which current I VR and the virtual current command I CR and subtraction to the current command I LR DC current detection I L from the sum of. The current control unit 44 controls the switching elements S1 and S2 by generating gate signals S G1 and S G2 so that the direct current becomes the current command I LR .

図３で示すように、直流電圧調整機能を有する電源または蓄電部を電流源として、ＰＩ制御により直流電圧の制御を行う場合、図３のブロック図から直流電圧ＶDCは以下の式となる。 As shown in FIG. 3, when a DC voltage is controlled by PI control using a power source or a power storage unit having a DC voltage adjustment function as a current source, the DC voltage V DC is expressed by the following equation from the block diagram of FIG.

Figure 2016158339
Figure 2016158339

ただし、ＶDC *は：直流電圧指令、ＩE：直流電圧調整機能を持たない電源の発生する電流、ＫP：ＰＩ制御比例ゲイン、ＫI：ＰＩ制御積分ゲイン、Ｃ：バスラインの静電容量、Ｒ：交流負荷の直流に接続された等価抵抗、
ここで、τ＝ＣＲ，ｋP＝Ｋp／Ｃ，ｋI＝ＫI／Ｃとすると、直流電圧ＶDCは Where V DC * is a DC voltage command, I E is a current generated by a power supply having no DC voltage adjustment function, K P is a PI control proportional gain, K I is a PI control integral gain, and C is an electrostatic capacity of a bus line. Capacity, R: equivalent resistance connected to the DC of the AC load,
Here, when τ = CR, k P = K p / C, k I = K I / C, the DC voltage V DC is

Figure 2016158339
Figure 2016158339

となり、電圧制御部における直流電圧指令ＶDC *に対する応答と、電流ＩEに対する応答は、τ，ｋP，ｋI，およびＣによって変化する。よって、Ｃの値とＲの取り得る範囲を想定してＫp，ＫIを決めるが、バスライン１に接続される機器が変わるとＣの値が変化して、電圧制御部の応答性・安定性に影響する。 Thus, the response to the DC voltage command V DC * and the response to the current I E in the voltage control unit vary depending on τ, k P , k I , and C. Therefore, K p and K I are determined assuming the range of C and R, but when the device connected to the bus line 1 changes, the value of C changes and the response of the voltage control unit Affects stability.

本発明での直流系統特性調整装置１０は、直流系統の容量Ｃを設定した値になるように動作することで、バスライン１に接続される機器構成が変わって容量Ｃの値が変化しても、直流電圧制御装置４の電圧制御系のパラメータを再調整することなく、制御特性を最初の状態と同じにするものである。   The DC system characteristic adjusting apparatus 10 according to the present invention operates so that the capacity C of the DC system becomes a set value, so that the device configuration connected to the bus line 1 changes and the value of the capacity C changes. Also, the control characteristics are made the same as in the initial state without readjusting the parameters of the voltage control system of the DC voltage control device 4.

図４は静電容量推定部１１の構成図を示したもので、この静電容量推定部１１の動作は、バスライン１に接続される機器構成の変更時に行う。その際、推定実施指令がホールド回路１１ｄとスイッチ部１１ｅに与えられると、先ず直流電圧検出ＶDCは微分回路１１ａにおいて微分され除算部１１ｂに入力される。除算部１１ｂでは、（３）式の演算を行ってバスライン推定容量ＣEを算出する。 FIG. 4 shows a configuration diagram of the capacitance estimation unit 11, and the operation of the capacitance estimation unit 11 is performed when the configuration of the device connected to the bus line 1 is changed. At this time, when an estimation execution command is given to the hold circuit 11d and the switch unit 11e, the DC voltage detection V DC is first differentiated by the differentiation circuit 11a and input to the division unit 11b. The division unit 11b calculates the bus line estimated capacity CE by performing the calculation of the equation (3).

Figure 2016158339
Figure 2016158339

すなわち、静電容量推定部１１は、直流電流検出ＩLを直流電圧検出の微分値ｄＶDCで除算し、ローパスフィルタ１１ｃを通ってホールド回路１１ｄに出力する。ホールド回路１１ｄは、推定実施指令をオンからオフにしたときの値を保持してバスライン推定容量ＣEとして減算部１２に出力し、設定静電容量ＣRとの差分が算出されて仮想容量指令ＣVRとなる。 That is, the capacitance estimating unit 11, the DC current detection I L divided by the differential value dV DC of the DC voltage detection, and outputs the hold circuit 11d through a low pass filter 11c. Hold circuit 11d outputs to the subtraction section 12 as the bus line estimation capacitance C E maintains the value when turning off the estimate performed command from on virtual capacity is calculated the difference between the set capacitance C R Command C VR .

一方、バスライン推定用電流指令発生部１１ｆは、方形波状の正，負側ともに同じ電流値で所定の周波数で正・負同一のバスライン推定用電流指令を発生し、バスライン電圧の変化からバスラインに接続されている容量を推定する。そのために推定実施指令のオンでスイッチ部１１ｅが閉じられたとき容量推定電流ＩESTを加算部１４に出力する。なお、容量推定電流ＩESTの周期は、負荷６による負荷電流の変化はあるものの微視的短時間で見て略一定電流値を与える時間とし、推定値に誤差を与えないようにしている。 On the other hand, the bus line estimation current command generator 11f generates a square line-shaped positive and negative bus line estimation current command at a predetermined frequency with the same current value on both the positive and negative sides, and from the change in the bus line voltage. Estimate the capacity connected to the bus line. Therefore, when the estimation execution command is turned on and the switch unit 11e is closed, the capacity estimation current I EST is output to the addition unit 14. Note that the period of the capacity estimation current I EST is a time for giving a substantially constant current value in a microscopic short time although there is a change in the load current due to the load 6 so that an error is not given to the estimated value.

図５は仮想容量制御部１３の構成図を示したもので、バスラインの直流電圧検出ＶDCをローパスフィルタ１３ａに通して微分回路１３ｂで微分し、乗算部１３ｃに出力する。乗算部１３ｃでは、微分値と仮想容量指令ＣVRとの乗算を行ってバスラインの仮想容量における電流推定ＩCVを生成し、加算部１４で容量推定電流ＩESTを加算して仮想電流指令ＩCRとして加減算部４３に入力され、電流指令ＩLRが算出される。 FIG. 5 shows a configuration diagram of the virtual capacity control unit 13. The DC voltage detection VDC of the bus line is passed through the low-pass filter 13a, differentiated by the differentiation circuit 13b, and output to the multiplication unit 13c. The multiplication unit 13c multiplies the differential value and the virtual capacity command C VR to generate a current estimation I CV in the virtual capacity of the bus line, and the addition unit 14 adds the capacity estimation current I EST to the virtual current command I CR is input to the addition / subtraction unit 43, and the current command I LR is calculated.

以上のように本発明は、異なった種類の複数の直流電源と、蓄電装置を有する直流電圧制御装置を同一の直流のバスラインに接続して構成した電力システムにおいて、バスラインに直流系統特性調整装置を接続し、直流系統の容量を設定した値になるよう動作させるものである。これにより、バスラインに接続される機器構成が変わって容量値が変化しても、擬似（仮想）容量の仮想設定を行うことで直流電圧制御装置の電圧制御系パラメータの再調整を省くことが可能となるものである。また、仮想設定を行う仮想容量の推定容量が負になることで、設定する仮想容量は実際の容量よりも小さい値にすることが可能となり、直流のバスラインに値の大きな容量が並列に接続されていても、全体の容量を設定値にすることが可能となるものである。   As described above, the present invention is a power system in which a plurality of different types of DC power supplies and a DC voltage control device having a power storage device are connected to the same DC bus line. The device is connected and operated so that the capacity of the DC system becomes a set value. As a result, even if the device configuration connected to the bus line changes and the capacitance value changes, it is possible to eliminate the need for readjustment of the voltage control system parameters of the DC voltage controller by performing virtual setting of the pseudo (virtual) capacitance. It is possible. In addition, since the estimated capacity of the virtual capacity for the virtual setting becomes negative, the virtual capacity to be set can be set to a value smaller than the actual capacity, and a large value capacity is connected in parallel to the DC bus line. Even if this is done, the overall capacity can be set to the set value.

１… バスライン
２… 太陽光発電装置
３… 風力発電装置
４… 直流電圧制御装置
５… 電力変換装置
６… 負荷
１０… 直流系統特性調整装置
１１… 静電容量推定部
１３… 仮想容量制御部
４２… 直流電圧制御部
４４… 電流制御部 DESCRIPTION OF SYMBOLS 1 ... Bus line 2 ... Solar power generation device 3 ... Wind power generation device 4 ... DC voltage control device 5 ... Power conversion device 6 ... Load 10 ... DC system characteristic adjustment device 11 ... Capacitance estimation part 13 ... Virtual capacity control part 42 ... DC voltage controller 44 ... Current controller

Claims (5)

直流のバスラインに、異なった種類の複数の直流電源と、蓄電装置を有する直流電圧制御装置を接続した電力システムにおいて、
前記直流のバスラインに直流系統特性調整装置を接続し、
前記直流のバスラインに接続された電源系統の構成変更時に、前記直流系統特性調整装置から仮想電流指令ＩCRを出力し、前記直流電圧制御装置の直流電圧制御部が出力した電流ＩVRに加算して前記バスラインの電圧制御指令としたことを特徴とする直流電源系統の特性安定化装置。 In a power system in which a DC bus line is connected to a plurality of different types of DC power supplies and a DC voltage control device having a power storage device,
Connect a DC system characteristic adjusting device to the DC bus line,
When the configuration of the power supply system connected to the DC bus line is changed, a virtual current command ICR is output from the DC system characteristic adjusting device and added to the current IVR output by the DC voltage control unit of the DC voltage control device And a voltage control command for the bus line. 前記直流系統特性調整装置は、直流電流検出ＩLと直流電圧検出ＶDCを入力してバスライン推定容量ＣEを推定出力すると共に、所定の周波数を有する容量推定電流ＩESTを発生するバスライン静電容量推定部と、
予め設定された設定静電容量ＣRと前記バスライン推定容量ＣEの差分と、直流電圧検出ＶDC、および前記容量推定電流ＩESTから前記仮想電流指令ＩCRを出力する仮想容量制御部を備えたことを特徴とする請求項１記載の直流電源系統の特性安定化装置。 The DC system characteristic adjusting device receives a DC current detection IL and a DC voltage detection VDC , estimates and outputs a bus line estimated capacity CE , and generates a capacity estimated current IEST having a predetermined frequency. A capacitance estimation unit;
A virtual capacity control unit that outputs the virtual current command I CR from a difference between a preset set capacitance C R and the bus line estimated capacity C E , a DC voltage detection V DC , and the capacity estimated current I EST ; The DC power supply system characteristic stabilization apparatus according to claim 1, further comprising: 前記直流系統特性調整装置は、直流電流検出ＩLを直流電圧検出ＶDCの微分値ｄＶDCで除算する除算部と、
推定実施指令のオン時に前記除算部による除算値を入力し、推定実施指令のオフ時に除算値をホールドしてバスライン推定容量ＣEとして出力するホールド回路と、
前記推定実施指令のオン時に、方形波状で正・負同一電流値で所定の周波数を有する容量推定電流ＩESTを発生するバスライン容量推定用電流指令発生部と、
前記バスライン推定容量ＣEと設定静電容量ＣRとの差分で生成される仮想容量指令ＣVRに、前記直流電圧検出ＶDCの微分値を乗算して電流推定ＩCVを生成する仮想容量制御部と、
前記仮想容量制御部により生成された電流推定ＩCVと前記容量推定電流ＩESTを加算して仮想電流指令ＩCRとして前記直流電圧制御装置に出力するよう構成したことを特徴とする請求項１又は２記載の直流電源系統の特性安定化装置。 The DC system characteristic adjustment device includes a dividing unit for dividing the DC current detection I L in the differential value dV DC of the DC voltage detection V DC,
A hold circuit that inputs a division value by the division unit when the estimation execution command is on, holds the division value when the estimation execution command is off, and outputs it as a bus line estimated capacity CE ;
When the estimation execution command is turned on, a bus line capacity estimation current command generation unit that generates a capacity estimation current I EST having a predetermined frequency with the same positive / negative current value as a square wave,
A virtual capacitance that generates a current estimate I CV by multiplying a virtual capacitance command C VR generated by the difference between the bus line estimated capacitance CE and the set capacitance C R by the differential value of the DC voltage detection V DC. A control unit;
The current estimation I CV generated by the virtual capacity control unit and the capacity estimation current I EST are added and output to the DC voltage controller as a virtual current command I CR. 2. A device for stabilizing the characteristics of a DC power supply system according to 2. 前記容量推定電流ＩESTは、方形波状の正，負側ともに同じ電流値で所定の周波数であることを特徴とする請求項２又は３記載の直流電源系統の特性安定化装置。 4. The DC power supply system characteristic stabilization apparatus according to claim 2, wherein the capacity estimation current I EST has a predetermined frequency with the same current value on both the positive and negative sides of a square wave. 前記直流電圧制御装置は、直列接続された２個のスイッチング素子からなるチョッパ回路と、
前記チョッパ回路に接続された電気二重層キャパシタと、
前記チョッパ回路の橋絡点と前記バスラインの正側間に接続されたリアクトルと、
前記直流電圧制御部が出力した電流ＩVRと前記仮想電流指令ＩCRとの加算値から電流検出ＩLを減じて電流指令ＩLRを生成し、生成された電流指令ＩLRを入力して前記スイッチング素子のゲート信号を算出する電流制御部を備えたことを特徴とする請求項１乃至４の何れか１項に記載の直流電源系統の特性安定化装置。 The DC voltage control device includes a chopper circuit composed of two switching elements connected in series;
An electric double layer capacitor connected to the chopper circuit;
A reactor connected between the bridge point of the chopper circuit and the positive side of the bus line;
The current command I LR is generated by subtracting the current detection I L from the added value of the current I VR output from the DC voltage controller and the virtual current command I CR, and the generated current command I LR is input to 5. The DC power supply system characteristic stabilization device according to claim 1, further comprising a current control unit that calculates a gate signal of the switching element.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108777546A (en) * 2018-06-08 2018-11-09 哈尔滨工程大学 A kind of stable control method of power inverter cascade system DC bus-bar voltage
US10784683B2 (en) 2017-10-23 2020-09-22 Delta Electronics (Shanghai) Co., Ltd Method of controlling electrical power system and apparatus using the same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07115770A (en) * 1993-10-18 1995-05-02 Toshiba Corp Control system for power converter
JP2014099986A (en) * 2012-11-14 2014-05-29 Toshiba Corp Composite power storage system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07115770A (en) * 1993-10-18 1995-05-02 Toshiba Corp Control system for power converter
JP2014099986A (en) * 2012-11-14 2014-05-29 Toshiba Corp Composite power storage system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10784683B2 (en) 2017-10-23 2020-09-22 Delta Electronics (Shanghai) Co., Ltd Method of controlling electrical power system and apparatus using the same
CN108777546A (en) * 2018-06-08 2018-11-09 哈尔滨工程大学 A kind of stable control method of power inverter cascade system DC bus-bar voltage
CN108777546B (en) * 2018-06-08 2020-06-16 哈尔滨工程大学 Method for stably controlling direct-current bus voltage of power converter cascade system

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