Direct-current voltage regulating device

Abstract

The utility model belongs to the field of voltage regulating devices, and relates to a direct-current voltage regulating device. The system is characterized in that the system comprises a bus voltage input module (100), one end of the bus voltage input module (100) is connected with a voltage reduction silicon chain module (200), and the other end of the voltage reduction silicon chain module (200) is connected with a controller module (300), a relay module (400) and a bus voltage output module (500). The direct-current voltage regulating device has the advantages that the direct-current voltage regulating device only needs three intermediate relays, the controller DT only needs three signal output points to control the first gear, the second gear and the fourth gear of the voltage reduction silicon chain respectively, and by means of logic combination controlled by the three relays, random selection of the seven gears is achieved, and needed standard voltage is output. The cost is saved, the failure rate is reduced, and the stability and the safety are greatly improved.

Description

Technical Field

[0001] The present invention belongs to the field of voltage regulating devices and relates to a DC voltage regulating device. Background Art

[0002] For the DC systems of all State Grid system substations and large and small user substations. The DC system is often divided into a 2V battery and a 12V battery DC system. The 2V battery DC system is composed of two parts: 104 cells and 108 cells. Currently, in the power grid, the equalizing charge voltage of 104 cells of the battery is DC242V, and a voltage regulating device is not required. While for the case of 108 cells of the battery, the equalizing charge voltage is DC254V, and a voltage regulating device is needed; in the application of the 12V battery in the DC system, 18 cells are required, and the equalizing charge voltage of 18 cells of 12V reaches DC254V, seriously exceeding the working voltage range of the busbar. Therefore, a voltage regulating device must be adopted for the 12V battery DC system. The voltage regulating device has a wide application in the power grid, and its use directly affects the voltage stability of the busbar. Therefore, we need to continuously improve it to enhance its working stability, safety, and reduce the failure rate.

[0003] The existing DC voltage regulating device has 7 signal output points for this controller, namely 1 - 7. The on / off of the coils of relays K1 - K7 are controlled through these 7 output points, and each relay corresponds to a gear of the step-down silicon chain. The controller DT-2 collects the output voltage. Arbitrarily closing a relay will short-circuit a gear of the step-down silicon chain, increasing the output voltage by DC5V, and the standard voltage of DC220V is achieved through combination. The DC voltage regulating device requires multiple relays, with many components, low stability, poor safety, high failure rate, and high cost. Summary of the Invention

[0004] In order to solve the problems of the existing DC voltage regulating device that requires multiple relays, has many components, low stability, poor safety, high failure rate, and high cost, the present invention provides a DC voltage regulating device, which is characterized in that: it includes a bus voltage input module, and one end of the bus voltage input module is connected with: a step-down silicon chain module, and the other end of the step-down silicon chain module is respectively connected with a controller module, a relay module, and a bus voltage output module.

[0005] According to the above-mentioned DC voltage regulating device, it is characterized in that: the relay module includes: a first intermediate relay K1, a second intermediate relay K2, and a third intermediate relay K3, and the contacts of the first intermediate relay K1, the contacts of the second intermediate relay K2, and the contacts of the third intermediate relay K3 are connected in series;

[0006] The bus voltage input module includes a positive bus voltage input +HM and a negative bus voltage input -HM;

[0007] The bus voltage output module includes the positive output terminal of the bus voltage +KM and the negative output terminal of the bus voltage -KM;

[0008] The controller module includes the controller DT;

[0009] The step-down silicon chain module includes: the first step-down diode D1, the second step-down diode D2, the third step-down diode D3, the fourth step-down diode D4, the fifth step-down diode D5, the sixth step-down diode D6, and the seventh step-down diode D7;

[0010] The negative electrode of the first step-down diode D1 is electrically connected to the positive input terminal of the bus voltage +HM. The negative electrode of the first step-down diode D1 is electrically connected to the positive electrode of the second step-down diode D2. The negative electrode of the second step-down diode D2 is electrically connected to the positive electrode of the third step-down diode D3. The negative electrode of the third step-down diode D3 is electrically connected to the positive electrode of the fourth step-down diode D4. The negative electrode of the fourth step-down diode D4 is electrically connected to the positive electrode of the fifth step-down diode D5. The negative electrode of the fifth step-down diode D5 is electrically connected to the positive electrode of the sixth step-down diode D6. The negative electrode of the sixth step-down diode D6 is electrically connected to the positive electrode of the seventh step-down diode D7. The negative electrode of the seventh step-down diode D7 is electrically connected to the positive output terminal of the bus voltage +KM;

[0011] One end of the contact of the first intermediate relay K1 is electrically connected to the positive electrode of the first step-down diode D1, and the other end of the contact of the first intermediate relay K1 is electrically connected to the negative electrode of the first step-down diode D1;

[0012] One end of the contact of the second intermediate relay K2 is electrically connected to the positive electrode of the second step-down diode D2, and the other end of the contact of the second intermediate relay K2 is electrically connected to the negative electrode of the third step-down diode D3;

[0013] One end of the contact of the third intermediate relay K3 is electrically connected to the positive electrode of the fourth step-down diode D4, and the other end of the contact of the third intermediate relay K3 is electrically connected to the negative electrode of the seventh step-down diode D7;

[0014] After one ends of the coils of the first intermediate relay K1, the second intermediate relay K2, and the third intermediate relay K3 are electrically connected together, they are respectively electrically connected to the positive output terminal of the bus voltage +KM and the pin 9 of the controller DT;

[0015] After the other ends of the coils of the first intermediate relay K1, the second intermediate relay K2, and the third intermediate relay K3 are electrically connected together, they are electrically connected to the negative input terminal of the bus voltage -HM;

[0016] The other end of the coil of the first intermediate relay K1 is electrically connected to pin 1 of the controller DT; the other end of the coil of the second intermediate relay K2 is electrically connected to pin 2 of the controller DT; the other end of the coil of the third intermediate relay K3 is electrically connected to pin 3 of the controller DT;

[0017] The negative pole of the bus voltage output - KM is electrically connected to pin 10 of the controller DT.

[0018] According to the DC voltage regulating device described above, it is characterized in that: the models of the first intermediate relay K1, the second intermediate relay K2, and the third intermediate relay K3 are all JQX - DC220V.

[0019] 4 According to the DC voltage regulating device described above, it is characterized in that: the voltage regulation range of the buck silicon chain module is 20V - 40V.

[0020] According to the DC voltage regulating device described above, it is characterized in that: the first buck diode D1, the second buck diode D2, the third buck diode D3, the fourth buck diode D4, the fifth buck diode D5, the sixth buck diode D6, and the seventh buck diode D7 are all DC 3V - 8V.

[0021] According to the DC voltage regulating device described above, it is characterized in that: the voltage between the positive pole + HM of the bus voltage input and the negative pole - HM of the bus voltage input is DC200V - DC300V.

[0022] According to the DC voltage regulating device described above, it is characterized in that: the voltage between the positive pole + KM of the bus voltage output and the negative pole - KM of the bus voltage output is DC210V - DC250V.

[0023] According to the DC voltage regulating device described above, it is characterized in that: the model of the controller DT is: DT - 3.

[0024] Advantages of the present invention compared with the prior art:

[0025] 1. The DC voltage regulating device of the present invention only requires 3 intermediate relays. These 3 relays respectively control the first gear, the second gear, and the fourth gear of the buck silicon chain. Through the logical combination controlled by these 3 relays, any selection of 7 gears can be realized to achieve the desired standard voltage. This saves the cost of the DC voltage regulating device.

[0026] 2. The controller DT of the DC voltage regulating device of the present invention only needs 3 signal output points to control, reducing the failure rate of the voltage regulating device during on - site operation, ensuring the stability of the operation of the entire DC equipment, and greatly improving the safety. Brief Description of the Drawings

[0027] Figure 1 Structural schematic diagram of the DC voltage regulating device of the present invention.

[0028] Figure 2 Structural schematic diagram of a DC voltage regulating device in the prior art.

[0029] Figure 3 Structural schematic diagram of the DC voltage regulating device of the present invention. Specific embodiments

[0030] Preferred embodiments

[0031] A DC voltage regulating device, characterized in that: it includes a bus voltage input module 100, one end of the bus voltage input module 100 is connected to: a step-down silicon chain module 200, and the other end of the step-down silicon chain module 200 is respectively connected to a controller module 300, a relay module 400, and a bus voltage output module 500.

[0032] The relay module 400 includes: a first intermediate relay K1, a second intermediate relay K2, and a third intermediate relay K3, and the contacts of the first intermediate relay K1, the contacts of the second intermediate relay K2, and the contacts of the third intermediate relay K3 are connected in series;

[0033] The bus voltage input module 100 includes a bus voltage input positive terminal +HM and a bus voltage input negative terminal -HM;

[0034] The bus voltage output module 500 includes a bus voltage output positive terminal +KM and a bus voltage output negative terminal -KM;

[0035] The controller module 300 includes a controller DT;

[0036] The step-down silicon chain module 200 includes: a first step-down diode D1, a second step-down diode D2, a third step-down diode D3, a fourth step-down diode D4, a fifth step-down diode D5, a sixth step-down diode D6, and a seventh step-down diode D7;

[0037] The negative electrode of the first step-down diode D1 is electrically connected to the bus voltage input positive terminal +HM, the negative electrode of the first step-down diode D1 is electrically connected to the positive electrode of the second step-down diode D2, the negative electrode of the second step-down diode D2 is electrically connected to the positive electrode of the third step-down diode D3, the negative electrode of the third step-down diode D3 is electrically connected to the positive electrode of the fourth step-down diode D4, the negative electrode of the fourth step-down diode D4 is electrically connected to the positive electrode of the fifth step-down diode D5, the negative electrode of the fifth step-down diode D5 is electrically connected to the positive electrode of the sixth step-down diode D6, the negative electrode of the sixth step-down diode D6 is electrically connected to the positive electrode of the seventh step-down diode D7, and the negative electrode of the seventh step-down diode D7 is electrically connected to the bus voltage output positive terminal +KM;

[0038] One end of the contact of the first intermediate relay K1 is electrically connected to the positive electrode of the first step-down diode D1, and the other end of the contact of the first intermediate relay K1 is electrically connected to the negative electrode of the first step-down diode D1;

[0039] One end of the contact of the second intermediate relay K2 is electrically connected to the positive electrode of the second step-down diode D2, and the other end of the contact of the second intermediate relay K2 is electrically connected to the negative electrode of the third step-down diode D3;

[0040] One end of the contact of the third intermediate relay K3 is electrically connected to the positive electrode of the fourth step-down diode D4, and the other end of the contact of the third intermediate relay K3 is electrically connected to the negative electrode of the seventh step-down diode D7;

[0041] After one ends of the coils of the first intermediate relay K1, the second intermediate relay K2, and the third intermediate relay K3 are electrically connected together, they are respectively electrically connected to the positive output terminal +KM of the bus voltage and the pin 9 of the controller DT;

[0042] After the other ends of the coils of the first intermediate relay K1, the second intermediate relay K2, and the third intermediate relay K3 are electrically connected together, they are electrically connected to the negative input terminal -HM of the bus voltage;

[0043] The other end of the coil of the first intermediate relay K1 is electrically connected to the pin 1 of the controller DT; the other end of the coil of the second intermediate relay K2 is electrically connected to the pin 2 of the controller DT; the other end of the coil of the third intermediate relay K3 is electrically connected to the pin 3 of the controller DT;

[0044] The negative output terminal -KM of the bus voltage is electrically connected to the pin 10 of the controller DT.

[0045] The models of the first intermediate relay K1, the second intermediate relay K2, and the third intermediate relay K3 are all JQX-DC220V.

[0046] The voltage regulation range of the step-down silicon chain module 200 is 20V - 40V.

[0047] The first step-down diode D1, the second step-down diode D2, the third step-down diode D3, the fourth step-down diode D4, the fifth step-down diode D5, the sixth step-down diode D6, and the seventh step-down diode D7 are all DC 5V.

[0048] The voltage between the positive input terminal +HM and the negative input terminal -HM of the bus voltage is DC 254V.

[0049] The voltage between the positive output terminal +KM and the negative output terminal -KM of the bus voltage is DC 220V.

[0050] The model of the controller DT is: DT-3.

[0051] The main circuits of the first intermediate relay K1, the second intermediate relay K2, and the third intermediate relay K3 are respectively connected in parallel to the step-down silicon chain module 200, and can respectively short-circuit the 1st gear, 2nd gear, and 4th gear of the step-down silicon chain module 200. The control coils of the first intermediate relay K1, the second intermediate relay K2, and the third intermediate relay K3 are connected to the controller DT, and the coil voltage is DC220V.

[0052] The step-down silicon chain module 200 is assembled by the step-down diodes, namely the first step-down diode D1, the second step-down diode D2, the third step-down diode D3, the fourth step-down diode D4, the fifth step-down diode D5, the sixth step-down diode D6, and the seventh step-down diode D7. This step-down silicon chain module 200 has 7 gears in total, and each gear can step down DC5V. Therefore, the total step-down range of this step-down silicon chain module 200 is DC0 - 35V. The main channel inlet of the step-down silicon chain module 200 is connected to +HM, and its input high voltage is, for example, DC254V, and the outlet is connected to +KM, and its control bus standard voltage is, for example, DC220V.

[0053] The automatic voltage regulator controller DT controls whether the pins 1 - 3 interfaces of the automatic voltage regulator controller DT output signals by collecting the voltage values of the outlets +KM and -KM, and the output signals can control the K1 - K3 relays to pull in.

[0054] The controller DT controls the K1 - K3 relays by judging the output voltage value. The pulling in of any relay will short-circuit a part of the corresponding step-down silicon chain module 200, and will correspondingly reduce the step-down range value. For example: If the voltage values of the outlets +KM and -KM collected by the controller DT are DC215V, the controller DT will judge whether the output pin 1 emits a signal. If no signal is emitted, the controller DT will emit a signal through the contact point 1. After K1 pulls in, the bus voltage rises to the required DC220V; if the output pin 1 is already in the emitting state, the controller DT will control the device to realize the relay that pulls in one gear.

[0055] Realize any combination of one to seven gears: The first gear is controlled by the single first intermediate relay K1, the second gear is controlled by the single second intermediate relay K2, the third gear is controlled by the first intermediate relay K1 and the second intermediate relay K2 together, the fourth gear is controlled by the single third intermediate relay K3, the fifth gear is controlled by the combination of the first intermediate relay K1 and the third intermediate relay K3, the sixth gear is controlled by the combination of the second intermediate relay K2 and the third intermediate relay K3, and the seventh gear is controlled by the first intermediate relay K1, the second intermediate relay K2, and the third intermediate relay K3 together. In this way, the controller DT can control the free switching from the first gear to the seventh gear to realize the voltage rise to DC220V.

Claims

1. A DC voltage regulating device, characterized in that: It includes a bus voltage input module (100). One end of the bus voltage input module (100) is connected to: a step-down silicon chain module (200), and the other end of the step-down silicon chain module (200) is respectively connected to a controller module (300), a relay module (400), and a bus voltage output module (500).

2. The DC voltage regulating device according to claim 1, characterized in that: The relay module (400) includes: a first intermediate relay K1, a second intermediate relay K2, and a third intermediate relay K3. The contacts of the first intermediate relay K1, the contacts of the second intermediate relay K2, and the contacts of the third intermediate relay K3 are connected in series; The bus voltage input module (100) includes a bus voltage input positive terminal +HM and a bus voltage input negative terminal -HM; The bus voltage output module (500) includes a bus voltage output positive terminal +KM and a bus voltage output negative terminal -KM; The controller module (300) includes a controller DT; The step-down silicon chain module (200) includes: a first step-down diode D1, a second step-down diode D2, a third step-down diode D3, a fourth step-down diode D4, a fifth step-down diode D5, a sixth step-down diode D6, and a seventh step-down diode D7; The negative electrode of the first step-down diode D1 is electrically connected to the bus voltage input positive terminal +HM. The negative electrode of the first step-down diode D1 is electrically connected to the positive electrode of the second step-down diode D2. The negative electrode of the second step-down diode D2 is electrically connected to the positive electrode of the third step-down diode D3. The negative electrode of the third step-down diode D3 is electrically connected to the positive electrode of the fourth step-down diode D4. The negative electrode of the fourth step-down diode D4 is electrically connected to the positive electrode of the fifth step-down diode D5. The negative electrode of the fifth step-down diode D5 is electrically connected to the positive electrode of the sixth step-down diode D6. The negative electrode of the sixth step-down diode D6 is electrically connected to the positive electrode of the seventh step-down diode D7. The negative electrode of the seventh step-down diode D7 is electrically connected to the bus voltage output positive terminal +KM; One end of the contact of the first intermediate relay K1 is electrically connected to the positive electrode of the first step-down diode D1, and the other end of the contact of the first intermediate relay K1 is electrically connected to the negative electrode of the first step-down diode D1; One end of the contact of the second intermediate relay K2 is electrically connected to the positive electrode of the second step-down diode D2, and the other end of the contact of the second intermediate relay K2 is electrically connected to the negative electrode of the third step-down diode D3; One end of the contact of the third intermediate relay K3 is electrically connected to the positive electrode of the fourth step-down diode D4, and the other end of the contact of the third intermediate relay K3 is electrically connected to the negative electrode of the seventh step-down diode D7; After one ends of the coils of the first intermediate relay K1, the second intermediate relay K2, and the third intermediate relay K3 are electrically connected together, they are respectively connected to the bus voltage output positive terminal +KM and the pin 9 of the controller DT; After the other ends of the coils of the first intermediate relay K1, the second intermediate relay K2, and the third intermediate relay K3 are electrically connected together, they are electrically connected to the bus voltage input negative terminal -HM; The other end of the coil of the first intermediate relay K1 is electrically connected to pin 1 of the controller DT; the other end of the coil of the second intermediate relay K2 is electrically connected to pin 2 of the controller DT; the other end of the coil of the third intermediate relay K3 is electrically connected to pin 3 of the controller DT; The negative pole of the bus voltage output -KM is electrically connected to pin 10 of the controller DT.

3. The DC voltage regulating device according to claim 1, characterized in that: The models of the first intermediate relay K1, the second intermediate relay K2, and the third intermediate relay K3 are all JQX-DC220V.

4. The DC voltage regulating device according to claim 1, characterized in that: The voltage regulation range of the buck silicon chain module (200) is 20V - 40V.

5. The DC voltage regulating device according to claim 1 or 4, characterized in that: The first buck diode D1, the second buck diode D2, the third buck diode D3, the fourth buck diode D4, the fifth buck diode D5, the sixth buck diode D6, and the seventh buck diode D7 are all 3V - 8V DC.

6. The DC voltage regulating device according to claim 5, characterized in that: The voltage between the positive pole +HM of the bus voltage input and the negative pole -HM of the bus voltage input is DC200V - DC300V.

7. The DC voltage regulating device according to claim 5, characterized in that: The voltage between the positive pole +KM of the bus voltage output and the negative pole -KM of the bus voltage output is DC210V - DC250V.

8. The DC voltage regulating device according to claim 6 or 7, characterized in that: The model of the controller DT is: DT-3.

Images